Academic literature on the topic 'Fabrication additive laser'
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Journal articles on the topic "Fabrication additive laser"
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Liu, Fwu Hsing, Wen Hsueng Lin, Yung Kang Shen, and Jeou Long Lee. "Fabrication Inner Channel Ceramics Using Layer Additive Method." Key Engineering Materials 443 (June 2010): 528–33. http://dx.doi.org/10.4028/www.scientific.net/kem.443.528.
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This paper presents a layer additive method, ceramic laser curing, to form a ceramic part with inner channel features, by which silica powder is bonded by curing effect under disposal of a 20W CO2 laser. This process includes four steps: making slurry by mixing a binder with ceramic powder, paving the slurry on the surface of a platform, scanning the paved slurry layer via laser beam, removing the un-cured slurries from the solidified ceramic component. This process needed only low laser power to build ceramic parts by using “curing effect”. The deflection and shrinkage of ceramics could be decreased, also the distortion due to post sintering process was avoidable. The inner channel structures were support by ceramic slurries to avoid the sagged deflection and to maintain the dimensional accuracy. The maximum flexural strength of the cured specimen was 4.7 MPa. This process has potential to fabricate inner complex ceramic components for industrial applications.
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Andre, J., G. De Demo, K. Molina, S. Le Tacon, C. Chicanne, and M. Theobald. "Application of Additive Manufacturing for Laser Target Fabrication." Fusion Science and Technology 73, no. 2 (January 23, 2018): 149–52. http://dx.doi.org/10.1080/15361055.2017.1406246.
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Hu, D., H. Mei, and R. Kovacevic. "Improving solid freeform fabrication by laser-based additive manufacturing." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 9 (September 1, 2002): 1253–64. http://dx.doi.org/10.1243/095440502760291808.
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Solid freeform fabrication (SFF) methods for metal part building, such as three-dimensional laser cladding, are generally less stable and less repeatable than other rapid prototyping methods. A large number of parameters govern the three-dimensional laser cladding process. These parameters are sensitive to the environmental variations, and they also influence each other. This paper introduces the research work in Research Center for Advanced Manufacturing (RCAM) to improve the performance of its developed three-dimensional laser cladding process: laser-based additive manufacturing (LBAM). Metal powder delivery real-time sensing is studied to achieve a further controllable powder delivery that is the key technology to build a composite material or alloy with a functionally gradient distribution. An opto-electronic sensor is designed to sense the powder delivery rate in real time. The experimental results show that the sensor's output voltage has a good linear relationship with the powder delivery rate. A closed-loop control system is also built for heat input control in the LBAM process, based on infrared image sensing. A camera with a high frame rate (up to 800frame/s) is installed coaxially to the top of the laser—nozzle set-up. A full view of the infrared images of the molten pool can be acquired with a short nozzle—substrate distance in different scanning directions, eliminating the image noise from the metal powder. The closed-loop control results show a great improvement in the geometrical accuracy of the built feature.
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Saunders, Jacob, Mohammad Elbestawi, and Qiyin Fang. "Ultrafast Laser Additive Manufacturing: A Review." Journal of Manufacturing and Materials Processing 7, no. 3 (May 5, 2023): 89. http://dx.doi.org/10.3390/jmmp7030089.
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Ultrafast lasers are proven and continually evolving manufacturing tools. Concurrently, additive manufacturing (AM) has emerged as a key area of interest for 3D fabrication of objects with arbitrary geometries. Use of ultrafast lasers for AM presents possibilities for next generation manufacturing techniques for hard-to-process materials, transparent materials, and micro- and nano-manufacturing. Of particular interest are selective laser melting/sintering (SLM/SLS), multiphoton lithography (MPL), laser-induced forward transfer (LIFT), pulsed laser deposition (PLD), and welding. The development, applications, and recent advancements of these technologies are described in this review as an overview and delineation of the burgeoning ultrafast laser AM field. As they mature, their adoption by industry and incorporation into commercial systems will be facilitated by process advancements such as: process monitoring and control, increased throughput, and their integration into hybrid manufacturing systems. Recent progress regarding these aspects is also reviewed.
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Zhou, Weiwei, Xiaohao Sun, Kengo Tsunoda, Keiko Kikuchi, Naoyuki Nomura, Kyosuke Yoshimi, and Akira Kawasaki. "Powder fabrication and laser additive manufacturing of MoSiBTiC alloy." Intermetallics 104 (January 2019): 33–42. http://dx.doi.org/10.1016/j.intermet.2018.10.012.
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Millon, Célia, Arnaud Vanhoye, and Anne-Françoise Obaton. "Ultrasons laser pour la détection de défauts sur pièces de fabrication additive métallique." Photoniques, no. 94 (November 2018): 34–37. http://dx.doi.org/10.1051/photon/20189434.
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La fabrication additive (FA), notamment la FA de pièces métalliques, connait un essor dans les secteurs de pointe comme l’aéronautique ou le médical de par les possibilités accrues en termes de complexité géométrique, de fonctionnalités ou encore de personnalisation des pièces. Cependant, les poudres métalliques et la fusion laser mis en oeuvre dans certains procédés lors de la fabrication conduisent parfois à des défauts, comme par exemple des manques de fusion. Pour réduire les coûts de production engendrés par des pièces finies mais non conformes, la fabrication de ces pièces appelle à développer un contrôle en ligne. Les ultrasons laser (UL), non destructifs et sans contact, sont une piste prometteuse : ils combinent la sensibilité d’un contrôle par ultrasons avec la flexibilité d’un système optique.
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Alhamdi, Ismail, Anwar Algamal, Abdalmageed Almotari, Majed Ali, Umesh Gandhi, and Ala Qattawi. "Fe-Mn-Al-Ni Shape Memory Alloy Additively Manufactured via Laser Powder Bed Fusion." Crystals 13, no. 10 (October 17, 2023): 1505. http://dx.doi.org/10.3390/cryst13101505.
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Fe-Mn-Al-Ni is an Fe-based shape memory alloy (SMA) featuring higher stability and low temperature dependency of superelasticity stress over a wide range of temperatures. Additive manufacturing (AM) is a promising technique for fabricating Fe-SMA with enhanced properties, which can eliminate the limitations associated with conventional fabrication and allow for the manufacture of complicated shapes with only a single-step fabrication. The current work investigates the densification behavior and fabrication window of an Fe-Mn-Al-Ni SMA using laser powder bed fusion (LPBF). Experimental optimization was performed to identify the optimum processing window parameters in terms of laser power and scanning speed to fabricate Fe-Mn-Al-Ni SMA samples. Laser remelting was also employed to improve the characteristics of Fe-Mn-Al-Ni-fabricated samples. Characterization and testing techniques were carried out to assess the densification behavior of Fe-Mn-Al-Ni to study surface roughness, density, porosity, and hardness. The findings indicated that using a laser power range of 175–200 W combined with a scanning speed of 800 mm/s within the defined processing window parameters can minimize the defects with the material and lead to decreased surface roughness, lower porosity, and higher densification.
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Kumar, Pankaj, and Gazanfar Mustafa Ali syed. "Emerging trend in manufacturing of 3D biomedical components using selective laser sintering: A review." E3S Web of Conferences 184 (2020): 01047. http://dx.doi.org/10.1051/e3sconf/202018401047.
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Additive manufacturing (also known as 3D printing) process is an emerging technique for the fabrication of biomedical components. Selective laser sintering or melting is one of the widely used additive printing technology for manufacturing of metallic and non-metallic components used in the industry. This review paper presents, a summary of the published research papers on the fabrication of biomedical components using selective laser sintering technique. Therefore, author meticulously attempted to investigate individual biocompatible material-wise review which includes Ti6Al4V, Ti-7.5 Mo alloy, β-Ti35Zr28Nb, PEEK, PA2200, and Polyamide/Hydroxyapatite. In addition, this article also explores the effects of the various laser sintering process parameters such as laser power, scanning speed, density of the material on the mechanical properties, tribological properties, porosity and surface roughness of the fabricated alloy. Moreover, the author also investigated challenges and future prospective of the laser processing of biomedical implants.
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Bi, Gunjun. "Special Issue on Advancements in Laser-Based Additive Manufacturing Technologies." Applied Sciences 13, no. 3 (January 24, 2023): 1529. http://dx.doi.org/10.3390/app13031529.
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Behrens, Ailke, Jan Stieghorst, Theodor Doll, and Ulrich P. Froriep. "Laser-Facilitated Additive Manufacturing Enables Fabrication of Biocompatible Neural Devices." Sensors 20, no. 22 (November 19, 2020): 6614. http://dx.doi.org/10.3390/s20226614.
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Current personalized treatment of neurological diseases is limited by availability of appropriate manufacturing methods suitable for long term sensors for neural electrical activities in the brain. An additive manufacturing process for polymer-based biocompatible neural sensors for chronic application towards individualized implants is here presented. To process thermal crosslinking polymers, the developed extrusion process enables, in combination with an infrared (IR)-Laser, accelerated curing directly after passing the outlet of the nozzle. As a result, no additional curing steps are necessary during the build-up. Furthermore, the minimal structure size can be achieved using the laser and, in combination with the extrusion parameters, provide structural resolutions desired. Active implant components fabricated using biocompatible materials for both conductive pathways and insulating cladding keep their biocompatible properties even after the additive manufacturing process. In addition, first characterization of the electric properties in terms of impedance towards application in neural tissues are shown. The printing toolkit developed enables processing of low-viscous, flexible polymeric thermal curing materials for fabrication of individualized neural implants.
Dissertations / Theses on the topic "Fabrication additive laser"
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Cherri, Alexis. "Poudres PEKK pour la fabrication additive par fusion laser." Thesis, Paris, HESAM, 2022. http://www.theses.fr/2022HESAE031.
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De nos jours, la course au développement de matériaux toujours plus innovants et performants fait subir une constante pression à un grand nombre de secteurs industriels. Parmi eux, l’aéronautique, l’aérospatial, les secteurs de transport et de production d’énergie cherchent à alléger la structure de leurs équipements afin d’en réduire la consommation en énergie et minimiser leur empreinte environnementale. Cet allègement se traduit généralement par la conversion des matériaux métalliques et denses vers des matériaux plastiques et plus légers. La spécificité de ces domaines d’utilisation, ainsi que les conditions de température, de pression, et de vieillissement accéléré auxquelles sont contraints certains de leurs équipements imposent néanmoins un cahier des charges très précis. Le procédé de frittage sélectif par laser (également appelé SLS), récemment mis en œuvre pour la fabrication de pièces thermoplastiques, constitue un grand intérêt pour ces différents secteurs d’activité dans lesquels des pièces sur mesure et à géométrie complexe sont requises. Ce procédé consiste à la fabrication couche par couche de pièces par fusion sélective de grains de poudre à l’aide d’un laser. Le PEKK, copolymère thermoplastique semi-cristallin de hautes performances, valide de nombreux critères lui permettant d’être, depuis quelques années, utilisé dans la fabrication de pièces par SLS. Cependant, la connaissance encore limitée que nous avons de ce polymère complexe, ainsi que sa structure de type copolymère, nécessitent encore à ce jour un travail de recherche conséquent. Cette thèse a eu ainsi pour but, sur une famille de PEKK déjà commercialisée, d’approfondir nos connaissances des propriétés de cristallisation et de fusion qui jouent un rôle essentiel dans la fabrication de pièces par la technologie SLS. Un deuxième objectif était de développer une nouvelle famille de copolymères PEKK à structure régulière. Afin de comprendre au mieux les propriété s de cristallisation de nos polymères, un modèle a été utilisé et une mise en commun de données SAXS / WAXS, DSC et rhéologiques est réalisée. La voie d’une utilisation en SLS d’une nouvelle famille de PEKK à chaîne alternée, jusque-là très peu explorée, a également été étudiéeNowadays, the need to develop ever more innovative and efficient materials puts constant pressure on a large number of industrial sectors. Among them, aeronautics, aerospace, transport and energy production sectors seek to lighten the structure of their equipment in order to reduce energy consumption and minimize their environmental footprint. This reduction generally results in the conversion of metallic and dense materials towards plastic and lighter materials. The specificities of these industrial sectors, as well as the conditions of temperature, pressure, and accelerated aging to which some of their equipment are constrained, impose very precise specifications. The selective laser sintering process (also called SLS), recently implemented for the manufacture of thermoplastic parts, is of great interest for these different sectors of activity in which custom-made parts with complex geometry are often required. This process consists of the layer-by-layer manufacturing of parts by selective melting of powder by a laser beam. PEKK, a high performance semi-crystalline thermoplastic copolymer, validates many of the criteria for use in SLS manufacturing. However, the still limited knowledge that we have of this polymer, as well as its copolymer-like structure, still require substantial research work to this day. The aim of this work was to deepen our knowledge of the properties of crystallization and melting of a commercially available PEKK grade designed for use in SLS. These properties are of key importance for the successful implementation of the SLS process. A second objective was to develop a new grade of PEKK copolymers with a regular structure. In order to better understand the crystallization properties of our polymers, a model was used and a combination of SAXS / WAXS, DSC and rheological studies is carried out. The way of using in SLS the new grade of PEKK, hitherto very little explored, was also studied. We demonstrated that the copolymer with the regular chain structure exhibits a much simpler crystallization mechanism and a higher crystallization enthalpy which may be a advantage for use in SLS
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Kovaleva, Irina. "Simulation numérique des procédés de fabrication additive: projection laser et fusion laser sélective." Ecole nationale d'ingénieurs (Saint-Etienne), 2015. http://www.theses.fr/2015ENISE031.
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Le travail est consacrée au développement des méthodes de modélisation mathématique d’interaction du laser avec les matières et avec les milieux poreux, appliquées aux technologies de fabrication additive des pièces tridimensionnelles. Le procédé de projection laser souffre des instabilités et des défauts des pièces et des revêtements obtenus telle que la fissuration, la liquation, les contraintes résiduelles, etc. A l’heure actuelle, la théorie générale de ce procédé n’existe pas. Un grand nombre des paramètres influence sur la projection laser, telles que les paramètres laser (la puissance, le diamètre du faisceau, la vitesse de balayage, etc. ), les paramètres de la poudre et ceux de l’écoulement de gaz. C’est pourquoi la recherche expérimentale des régimes technologiques optimaux devient un problème compliqué. L’actualité du travail est dans la nécessité de réaliser des calculs et pronostics des régimes rationnels du traitement laser, face aux demandes de qualité des pièces fabriquées et à l’optimisation des procédés. Nous avons effectué une étude détaillée des paramètres de flux de gaz et de poudre pour les buses coaxiales différentes. Les paramètres du jet de poudre dépendent de: la configuration géométrique, la taille des canaux de sortie de la buse, la composition de la poudre, sa diffusion, les caractéristiques de l'interaction des particules avec les parois de la buse. Nous avons développé un modèle physico-mathématique d’accélération des particules de poudre dans le champ lumineux du rayonnement laser constant ; celui-ci est présent dans les conditions du rechargement de poudre par laser moyennant la pression du rappel des vapeurs du métal, provenant de la partie exposée de la particule. Nous avons proposé la méthodologie de calcul de l’empilement primaire de particules sphériques polydispersées ; compte tenu de la force du poids et de l’adhésion entre les particules en contact, elle permet d’obtenir une structure intérieure de la couche déposée proche à la structure réelle. Nous avons développé un modèle discret de description des processus de transfert de chaleur et de masse dans la couche de poudre déposée, applicable dans les conditions d’impact local du laser lors de la fusion et du frittage sélectifs par laser. Les modèles physico-mathématiques et les résultats proposés ont une importance pratique et portent un caractère novateur. La crédibilité des études réalisées au niveau qualitatif se coordonne avec les données des essaisThis work is devoted to development of mathematical modeling methods of laser interaction with materials and porous media, used in the additive technologies for the production of volume products. The process of laser cladding suffers from faults and defects of parts and coatings obtained such as cracks, exudations, residual stresses and etc. Currently, the general theory of this process does not exist. A large number of parameters affect the laser cladding such as laser parameters (power, beam diameter, scanning speed, etc. ), parameters of powder and gas flow. Therefore, experimental investigations of optimum technological modes become the complex problem. The relevance of this work is the need to perform calculations and predictions of rational modes of laser treatment, due to the increasing quality requirements of manufactured parts and technological processes optimization. We investigated in details the parameters of the gas stream and the powder for different coaxial nozzles. The parameters of powder jet essentially depends on the geometrical configuration and the size of output nozzle channels and also the composition of the powder, its dispersion and features of particles interaction with the walls of nozzle. We developed a physical-mathematical model of acceleration of powder particles in the light field of a permanent laser radiation in the conditions of laser cladding owing to the force caused by the reaction of the material–vapor recoil from the beamed part of the particle. We proposed a calculation method of random packing of polydisperse spherical particles which allows, taking into account the weight force and adhesive force between the particles in contact, to obtain the internal structure of loose powder layer close to the real. Discrete model is developed to describe the processes of heat and mass transfer in loose powder layer, which is applicable in the conditions of local laser irradiation in selective laser melting and selective laser sintering. Physico-mathematical models proposed in this work and results of calculations are new and have a practical relevance. The reliability of spent researches is consistent qualitatively with experimental data
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Sakly, Adnene. "Fabrication additive de pièces à base d'alliages métalliques complexes." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0008/document.
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Cette étude s'inscrit dans le cadre du développement de nouveaux matériaux pour la fabrication additive. Notre objectif est la fabrication de pièces comprenant un alliage métallique complexe (CMA) à l'aide d'un laser UV de stéréolithographie. L'alliage choisi est un alliage quasicristallin dominé par une phase icosaédrique du système AlCuFeB. Des poudres brutes d'atomisations ont été caractérisées par diffractions des rayons X et analyse thermique différentielle. Nous avons montré une bonne absorbance optique de la poudre dans le domaine UV-visible qui rend possible un début de frittage sous l'effet du laser correspondant à la formation de pontages entre les grains à une température d'environ 820°C. Concernant la fabrication à partir d'une suspension de poudres dans un liant, nous avons étudié les propriétés de mouillage des particules AlCuFeB et optimisé un mélange avec une résine époxy chargée par 20 % vol. de particules CMA. L'absorption optique de la suspension dans le domaine UV est suffisante pour fabriquer une pièce composite par stéréolithographie. La granulométrie utilisée est inférieure à 25 µm. Nous avons ainsi réussi à fabriquer des pièces de 14 mm de hauteur, en additionnant des couches de 50 µm. À partir des pièces réalisées, nous avons caractérisé la dureté et les propriétés tribologiques de ce nouveau matériau composite. La dureté des pièces ainsi fabriquées est supérieure à celle de la résine seule et atteint 88 Shore D. Nous avons également mis en évidence une amélioration de 30 % du coefficient de frottement et une diminution du volume d'usure de 40 % par rapport au matériau de la matrice époxy. Ces propriétés rendent attractif ce nouveau matériau composite pour la fabrication par stéréolithographieThis study aimed at developing new materials for additive manufacturing. We focused on producing parts containing complex metallic alloys (CMA) using a UV laser used for stereolithography. The selected intermetallic is a quasicrystalline alloy dominated by the icosahedral phase in the system AlCuFeB. The raw powders produced by gas atomization were characterized by X-ray diffraction and differential thermal analysis. The powders exhibit good optical absorption properties in the UV-visible range allowing direct laser sintering as evidenced by the formation of bridges between the grains at a temperature of about 820°C. In a second step, we have considered the manufacturing of parts made of a suspension of CMA powders in a binder. We have studied the wetting properties of the particles AlCuFeB and optimized a mixture consisting of an epoxy resin filled with 20 % vol. of CMA particles. The optical absorption of the suspension in the UV range was sufficient to produce composite parts by stereolithography. The particle size used was smaller than 25 micrometers. We have managed to make parts reaching 14 mm in height by adding layers with a thickness of 50 microns. Using test samples, we have characterized the hardness and the tribological properties of this new composite material. The hardness of the parts produced by stereolithography is larger than that of epoxy parts and reaches 88 Shore D. We have also shown a 30 % reduction of the friction coefficient as well as a 40 % reduction of wear losses compared to the epoxy matrix. These properties make attractive this new composite material for stereolithography applications
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Andreau, Olivier. "Nocivité en fatigue et contrôle de défauts produits par fabrication additive." Thesis, Paris, ENSAM, 2019. http://www.theses.fr/2019ENAM0037.
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Le procédé de fusion laser sélective de lit de poudre, également appelé SLM, permet de fabriquer des pièces métalliques en fusionnant des couches de poudre. Cette méthode novatrice donne accès à un large éventail de pièces aux géométries complexes, permettant notamment d’alléger les structures. Toutefois, la bonne tenue mécanique de ce type de pièces, en particulier dans le domaine de la fatigue, reste un enjeu industriel majeur. Les pièces élaborées par SLM peuvent en effet contenir des pores (débouchants ou internes) pouvant détériorer leurs propriétés mécaniques. Les travaux réalisés ont pour but de caractériser l’influence de défauts poreux sur l’endurance en fatigue à grand nombre de cycles de pièces en acier 316L fabriquées par SLM, et s’articulent autour de trois parties. La première consiste à identifier les paramètres de fabrication SLM contrôlant la densification et la microstructure des pièces. Une distinction sera faite entre les différents types de pores créés, dont la morphologie et les dimensions dépendent des conditions énergétiques de l’interaction laser-matière. Les pores créés seront mis en perspective par la microstructure du matériau brut, dont l’orientation cristallographique et la taille de grain est principalement reliée au recouvrement et la morphologie des cordons. Le deuxième aspect des travaux a consisté à utiliser les résultats de la recherche paramétrique pour générer des éprouvettes de fatigue contenant différentes populations de défauts aléatoires (stochastiques) internes observées en tomographie à rayons X, tout en conservant des microstructures similaires. L’influence relative des populations de défauts internes créées sur l’endurance en fatigue est quantifiée et comparée à la tenue d’éprouvettes optimisées contenant un taux de porosité minimal. Enfin, des défauts modèles internes (déterministes) aux dimensions variables, et dont la position et la morphologie sont contrôlées, ont été générés après optimisation paramétrique dans des pièces denses. Un seuil d’amorçage sur défaut interne par rapport aux défauts de surface a ainsi pu être dégagé, et pourrait être lié à l’environnement gazeux local lors de l’amorçage et la propagation de la fissureThe Selective Laser Melting Process (SLM) consists in manufacturing metallic parts by melting successive powders layers. This new additive manufacturing method allows building new complex geometries that can help lighten structures, such as lattice parts. However, the mechanical properties of additive manufacturing parts are still an industrial concern, especially for high cycle fatigue behavior. Such parts can indeed comprise surface and internal pores that can be deleterious to mechanical properties. The goal of this thesis is to characterize the influence of porous defects on the high cycle fatigue fatigue performance of 316L SLM parts. Firstly, some key SLM parameters that can control the porosity and the microstructure of fabricated parts were quantified. A distinction between the pore types was proposed, and their characteristics were related to the volumetric energy density delivered by the laser. The microstructure was also investigated, with a focus on crystallographic orientation and grain size, depending on the melt pool overlap and morphology. Secondly, using X-ray tomography, a parametric research was conducted to generate and characterize optimized fatigue samples with a minimal amount of pores. Such samples were used as a reference for other fatigue samples containing various randomly distributed pore populations, with similar microstructures. The relative influence of different internal pore populations on the high cycle fatigue endurance was quantified, for similar surface pore population. Finally, deterministic pores with controlled morphology, position and various dimensions were generated after a detailed parametric optimization. A specific internal crack initiation threshold was evidenced for deterministic defects, which was supposed to be linked to the local gaseous environment during crack initiation and propagation
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Pouzet, Sébastien. "Fabrication additive de composites à matrice titane par fusion laser de poudre projetée." Thesis, Paris, ENSAM, 2015. http://www.theses.fr/2015ENAM0051/document.
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Les composites à matrice titane (CMTi) sont des matériaux attractifs pour des applications aéronautiques, en raison de leurs performances mécaniques à haute température et de leur faible densité. La difficulté d’usiner ce type de matériaux rend les procédés de fabrication additive intéressants pour la fabrication de pièces complexes en trois dimensions. Cette étude porte sur l'élaboration de composites à matrice titane par le procédé de fabrication additive par fusion laser de poudre projetée. Dans un premier temps, différents types de poudres- renfort et de préparations de poudre ont été utilisés pour faciliter la mise en œuvre du procédé additif, dans le but d’obtenir des microstructures homogènes. Dans un second temps, l’étude s’est concentrée sur le mélange Ti-6Al-4V / B4C formant des renforts TiB et TiC par voie in-situ dans une matrice de Ti-6Al-4V. Les mécanismes de formation des microstructures obtenues ont pu être expliqués puis une étude des propriétés mécaniques (dureté, module d’Young et comportement sous une sollicitation en traction à chaud et à l’ambiante) a été réalisée afin d’évaluer l’effet du renforcement sur les propriétés mécaniques du matériau. Parmi les résultats importants ce cette étude, la présence de taux de carbone élevés en solution solide dans la matrice de titane a été évoqué comme étant le facteur prédominant dans l'augmentation des propriétés mécaniques avec le taux de B4CTitanium matrix composites are attractive materials for aeronautical applications, mainly because of their superior mechanical resistance at elevated temperature, combined with a low density. The critical machinability of such composites makes additive manufacturing processes particularly adapted for building complex 3D shapes. This study has been focused on the Direct Metal Deposition (DMD) of Metal matrix composites. In a first step, various powders and powder blends have been carried out in order to facilitate the DMD process and to obtain homogeneous microstructures. Following this, Ti-6Al-4V / B4C powder blends, allowing to obtain TiB + TiC particles distributed in the Ti matrix were more specifically considered. Metallurgical mechanisms involved in the formation of microstructures were identified prior to an investigation on mechanical properties at ambient and elevated temperature for various DMD process conditions and particle concentrations. Among the most interesting results of this study, the influence of a high carbon content solubilized in the Ti-matrix was considered as a dominant factor to explain the evolution of mechanical properties with increased amounts of reinforcements
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Constantin, Loic. "Fabrication additive assisté laser de matériaux composites 3D et revêtement diamant par CVD." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0066.
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L'augmentation constante de la fréquence de travail des dispositifs à base de semi-conducteurs avec leur miniaturisation a conduit à une surchauffe sévère, qui affecte leur durée de vie et leur fiabilité. Par conséquent, la gestion thermique est devenue une préoccupation importante dans le domaine microélectronique et doit être abordée. Le diamant (D) est connu pour être un excellent matériau pour la dissipation thermique car il possède l'une des conductivités thermiques les plus élevées de tous les matériaux naturels et possède une résistivité électrique élevée. D peut refroidir les puces électroniques de deux manières. Lorsqu'il est utilisé sous forme de film, D agit comme un diffuseur de chaleur. Lorsqu'ils sont utilisés sous forme de poudre, les Ds peuvent être introduits dans les métaux pour améliorer leur conductivités thermiques (TC) et apporter une stabilité dimensionnelle à des températures élevées. Les matériaux composites métal / D résultants sont ainsi d'excellents composants pour former des dissipateurs thermiques. Naturellement, les performances thermiques des dissipateurs thermiques sont étroitement liées à leur surface. Malgré l'attrait des matériaux à base de D en termes de performances thermiques, ils présentent souvent une géométrie simple, principalement en raison de la complexité d’usiner des matériaux à base de D dans des formes complexes. L'impression laser 3D est une méthode émergente de fabrication de géométrie sophistiquées et a donné des résultats prometteurs pour divers métaux et alliages. Dans cette étude, l'impression 3D laser de matériaux composites cuivre / D est proposée pour fabriquer des structures complexes de Cu / D qui pourraient remodeler leurs applications. Avant de fabriquer des matériaux composites Cu / D de manière additive, plusieurs défis doivent être relevés. Premièrement, la fabrication additive de Cu pur est optimisée et caractérisée. Puis, faute d'une affinité chimique entre Cu et D, une interphase est introduite dans le matériau composite. Plus tard, un procédé de revêtement de sel fondu est étudié pour produire un revêtement gradué et multicouche d'oxyde / carbure et de carbure / carbure, respectivement, sur des matériaux carbones. Ensuite, la fabrication additive de structures composites Cu / D est présentée. Enfin, le dépôt des films D est réalisé avec une flamme oxyacétylénique assistée laser. Les effets de l'introduction de lasers ultraviolets dans la flamme sont caractérisés en termes de réaction chimique, de qualité du film D et de taux de croissanceThe constant increase of the working frequency of semiconductor-based devices with their miniaturization led to severe overheating, which affect their lifetime and reliability. Hence, thermal management has become a significant concern for the microelectronic area and needs to be addressed. Diamond (D) is known to be an excellent material for thermal dissipation as it possesses one of the highest thermal conductivity (TC) of any natural material and has a high electrical resistivity. D can cool electronic chips in two ways. When used in the form of a film, D acts as a heat spreader. When utilized in powder-form, Ds can be introduced into metals to enhance their TC and bring dimensional stability at elevated temperatures. The resulting metal/D composite materials are thus, excellent component to form heat sinks. Naturally, the thermal performances of heat sinks are closely related to their surface area. Although the attractiveness of D-based materials in term of thermal performance, they often exhibit simple geometry mostly due to the complexity of machining D-based materials into intricated designs. Laser 3D printing is an emerging method of manufacturing sophisticated designs and has shown promising results for various metal and alloys. In this study, the laser 3D printing of copper/D composite materials is proposed to fabricate highly complex Cu/D structures which could remodel their applications. Before additively manufactured Cu/D composite materials, several challenges need to be addressed. First, the additive manufacturing of pure Cu is optimized and characterized. Then, due to a lack of a chemical affinity between Cu and D, the Cu-D interfacial zone is introduced in the composite material. Later, a molten salt coating process is studied to produced graded and multilayer coating of oxide/carbide and carbide/carbide, respectively, on carbon materials. Next, the additive manufacturing of highly sophisticated Cu/D composite structures is presented. Finally, the deposition of D films is performed by laser-assisted combustion flame. The effects of introducing ultraviolet lasers into the combustion flame are characterized in terms of chemical reaction and D film quality and growth rate
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François, Mathieu. "Conception pour la fabrication additive, par fusion laser sur lit de poudre, de composants hyperfrequences." Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE008.
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Pendant de nombreuses années, les composants passifs hyperfréquences ont été utilisés dans des systèmes de communication notamment pour des chaînes d'alimentation d'antenne. Ce type d'équipement radiofréquence est déjà largement opérationnel dans différents domaines tels que les communications satellite, les radars, les observations spatiales etc. en raison de leurs avantages de faibles pertes ainsi que de leur capacité élevée de gestion d'énergie. Seulement, avec l'émergence de nouvelles technologies et une concurrence considérable sur le marché de la défense, les clients sont de plus en plus demandeurs de produits de moins en moins coûteux avec des délais d’obtention toujours plus courts, avec des exigences liées aux performances toutes aussi élevées.Ces dernières années, plusieurs institutions et industries se sont intéressées de plus en plus aux procédés de fabrication additive pour les composants à propagation guidée. Ne nécessitant pas de brut de matière ni d'outillage dédié, les technologies additives apportent de nouvelles perspectives de conception. En particulier, l'ajout de matière couche par couche autorise la fabrication de pièces monolithiques, qui permettraient d'alléger les équipements et de réaliser des économies de temps et de coûts. D'autre part, l'une des plus grandes promesses de la fabrication additive réside dans les degrés de liberté supplémentaires qu'elle offre en conception, permettant de concevoir des architectures complexes et innovantes aux performances accrues, qui seraient irréalisables par des techniques conventionnelles. A ce titre, la fabrication additive a été identifiée comme pouvant jouer un rôle crucial dans le développement de ce type de pièce.Cependant, comme tout procédé de fabrication, les procédés additifs possèdent leurs propres spécificités et contraintes liées aux phénomènes physiques mis en jeu au cours de la fabrication et dont il est nécessaire de tenir compte au cours de la phase de conception pour tirer pleinement profit des avantages qu'ils offrent. Ajoutées aux exigences hyperfréquences, le concepteur doit alors être en capacité d'identifier les liens qui existent entre les domaines de la conception, du procédé et électromagnétique pour garantir une pièce de qualité conforme au cahier des charges.L'objectif de ces travaux de thèse est double. Le premier consiste à identifier les spécificités du procédé de fusion laser sur lit de poudre qui influent majoritairement sur les performances électromagnétiques, de manière à y apporter une attention particulière en phase de conception. Le second porte sur l'élaboration d'une méthode qui intègre les contraintes et opportunités de la fabrication additive tout en répondant aux objectifs, globaux et locaux, issus du cahier des charges hyperfréquences de manière à fabriquer des composants opérationnelsFor many years, passive microwave waveguide components have been used in communication systems, particularly for antenna feed chains. This kind of radiofrequency equipment is already widely operational in various fields such as satellite communications, radars, space observations, etc. Because of their low loss as well as their high energy management capacity. However, the emergence of new technologies and the significant degree of competition that occurs within the defense market, customers are increasingly calling for lower-cost products, shorter lead times, with requirements equally high.Over the past years, several institutions and industries have become more and more interested in additive manufacturing processes for passive waveguide components. Without any need for raw material or dedicated tools, additive technologies bring some new design perspectives. In particular, the addition of material layer by layer promotes the manufacture of monolithic parts, which would contribute to lighten the weight of antennas and save time and costs. On the other hand, it offers additional degrees of freedom during the design stage, encouraging the development of complex and innovative architectures, resulting in increased performance, which would be unachievable by conventional techniques. As such, additive manufacturing has been identified as being able to play a crucial role in the development of this type of part.However, like any other manufacturing process, additive processes involve several physical phenomena and so have their own manufacturing specificities and constraints to consider during the design phase to benefit fully from all the potential of additive manufacturing. Combined with the microwave requirements, the designer must then be able to identify the correlation between design, process and electromagnetic to guarantee a quality part conforming to the specifications.The objective of this study is twofold. The first one consists of identifying the specificities of the laser beam melting process with a major influence on electromagnetic properties, in order to be able to pay special attention during the design phase. The second concerns the development of a method that incorporates the constraints and opportunities of additive manufacturing while meeting the objectives arising from the microwave specifications
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Ettaieb, Kamel. "Contribution à l'optimisation des stratégies de lagase en fabrication additive LPBF." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN050.
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Au cours du procédé de fusion laser sur lit de poudre, la température atteinte dans une zone locale est susceptible de générer des gradients thermiques importants. Ces gradients conduisent à leur tour à l'apparition de contraintes résiduelles qui ont un effet sur les caractéristiques mécaniques de la pièce, provoquent des déformations, ainsi que des micro et macro fissures. Dans ce contexte, les trajectoires de lasage jouent un rôle fondamental sur le niveau et la distribution de la température au cours de la fabrication. Il est ainsi nécessaire de valider la génération des trajectoires au regard du comportement thermique induit par ce procédé.Cette thèse propose d'exploiter une méthode analytique pour développer un modèle qui permette d'analyser d'une manière rapide et efficace le comportement thermique dans la pièce lors de la fabrication. En effet, à partir d'une trajectoire de lasage donnée, d'un ensemble de paramètres liés au matériau de la pièce à fabriquer et de paramètres liés au procédé, l'outil développé effectue une simulation de la température en chaque point de la pièce, au cours de temps et de manière rapide, comparée aux autres logiciels de simulation thermique. En effet, afin de réduire le temps de calcul et l'espace mémoire utilisé pour une telle simulation, un ensemble de techniques d'optimisation a été mis en place.Le modèle proposé a été validé dans le cas de l'alliage Ti6Al4V par comparaison avec une simulation thermique par éléments finis obtenue par un logiciel industriel. Ensuite, les résultats de ce modèle sont confrontés aux résultats expérimentaux. Une fois le modèle validé, il a été mis en œuvre pour analyser des trajectoires couramment utilisées dans la littérature et dans l'industrie.Afin de réduire les gradients thermiques et améliorer la qualité des pièces, la solution proposée consiste à contrôler la température et la taille du bain de fusion. Pour se faire, le modèle thermique développé a été exploité pour moduler les paramètres du procédé au cours de la fabrication d'une part et pour développer une stratégie de lasage à pas adaptatif d'autre partDuring manufacturing by Laser Powder Bed Fusion (LPBF), the achieved temperatures in local areas could generate significant thermal gradients. These gradients lead to the apparition of residual stresses which affect the mechanical characteristics of the part and may cause deformation, as well as micro and macro cracks. In this context, scanning paths play a fundamental role on temperature level and distribution during manufacturing. For that reason, it is necessary to validate the generation of trajectories considering the thermal behaviour induced by this process.The purpose of this PhD thesis is to use an analytical method in order to develop a model that allows a fast and efficient analysis of thermal behaviour, during part manufacturing. Indeed, with a given scanning path, material properties and process parameters, the developed tool performs a temperature simulation at each point of the part, over time and in a fast way, compared to other thermal simulation software. In order to reduce computation time and memory storage used for such a simulation, a set of optimization techniques has been proposed.The developed model has been validated in the case of the Ti6Al4V alloy through a comparison with a finite element thermal simulation obtained by industrial software. Then, the results of this model were compared to experimental results. Once validated, it has been implemented to analyze trajectories commonly used in the literature and industry.In order to reduce thermal gradients and improve part quality, the proposed solution consists in controlling the temperature and size of melt pool. For this purpose, the developed thermal model has been used to modulate the process parameters during manufacturing on the one hand and to develop an adaptive scanning strategy on the other hand
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Galy, Cassiopee. "Etude des interactions matériau/procédé en vue d'une optimisation des conditions opératoires du procédé de fabrication additive SLM sur des alliages d'aluminium pour des applications aéronautiques." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0106/document.
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La fusion laser sélective d’un lit de poudres (Selective Laser Melting – SLM) connait un véritable essor depuis quelques années,notamment en ce qui concerne la production de pièces métalliques. La faible densité des alliages d’aluminium, conjuguée à l’optimisation de conception rendue possible grâce aux procédés de fabrication additive, assure un gain de masse des structures conséquent, ce qui intéresse fortement les industriels des domaines automobile et aéronautique. Cependant, les propriétés finales des pièces aluminium fabriquées par SLM dépendent des nombreux défauts sont générés lors de la fabrication (porosités, fissuration à chaud, état de surface, …). Cette thèse s’intéresse aux moyens de mieux maîtriser ces problèmes en explorant trois axes : Une identification et sélection des méthodes de caractérisations adaptées aux spécificités des matériaux métalliques élaborés par les procédés de fabrication additive « lit de poudre » a été mise en place. Par exemple, la comparaison de différentes méthodes de détermination de la densité relative de pièces nous a permis de montrer les avantages et inconvénients de chacune des techniques employées ; Une étude du moyen de fabrication SLM a mis en évidence l’influence de différents facteurs (flux de gaz, position des éprouvettes sur le plateau de construction, méthodes de dépôt de la poudre) sur les propriétés finales des pièces produites.Ces éléments ont un impact sur la densité des pièces, leurs propriétés de surface et leurs propriétés mécaniques. Nous avons ainsi constaté que la façon de positionner une pièce sur le plateau est une étape de la préparation d’une fabrication à ne pas négliger ; Les études paramétriques menées sur deux types d’alliages d’aluminium, AlSi7Mg0,6 et AM205, ont montré que la composition chimique de l’alliage d’aluminium employé influence de façon non négligeable le jeu de paramètres opératoires à appliquer pour fabriquer une pièce de manière optimale. La densité d’énergie volumique ψ, rapport de la puissance laser avec le produit de la vitesse de lasage, de la distance inter-cordons et de l’épaisseur de couche, est utilisée de façon classique pour l’optimisation des conditions opératoires en SLM. Nos études expérimentales à différentes échelles (1D et3D) ont permis de mettre en évidence les limites de ce critère. La combinaison de ces résultats à la simulation numérique du lasage d’un cordon de poudre a servi de base à la définition d’un premier modèle dont l’objectif sera à terme d’optimiser le choix des paramètres de fabricationInterest in selective laser melting (SLM) has been growing in recent years, particularly with regard to the production of metal parts.The low density of aluminum alloys, combined with the possible design optimization enabled by additive manufacturing processes,ensures a significant decrease in the mass of structures which is very interesting for manufacturers in the automotive and aerospaceindustries. However, it is difficult to control the final properties of aluminum parts manufactured by SLM because many defects, suchas porosity, hot cracking, and surface roughness, are generated during the process. To better understand how to optimize theperformance of SLM aluminium parts, several studies were conducted during this work: An identification and selection of characterization methods well-adapted to the specificities of metallic materials developedby powder bed additive manufacturing processes was established. For instance, the comparison of different methods ofdetermining the relative density of parts showed the advantages and disadvantages of each of the techniques; A study of the SLM machine highlighted the influence of various factors (gas flow, positions of specimens on the constructionplate, or methods of depositing the powder) on the final properties of the produced parts. These elements have an impacton the density of the parts, their surface properties, and their mechanical properties. We found that the positioning of a pieceon the tray is a critical step in the preparation of a build that is not to be neglected; Parametric studies carried out on two types of aluminum alloys—AlSi7Mg0,6 and AM205—have shown that the chemicalcomposition of the aluminum alloy used has a significant influence on the set of operating parameters required tomanufacture an acceptable aluminum alloy part. The energy density, ψ, which is the ratio of the laser power to the productof the lasing speed, the hatching distance, and the layer thickness, is conventionally used for the optimization of the operatingconditions in SLM. Our experimental studies performed at different scales (1D and 3D) have shown the limits of this criterion.The combination of these results with the numerical simulation of the lasing of a single powder bead served as a basis forthe definition of an initial model, the final objective of which will be to optimize the choice of manufacturing parameters
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Relave, Sébastien. "Caractérisation et prédiction de la microstructure obtenue par fabrication additive. Application aux aciers inoxydables." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEM003.
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Dans la famille des procédés de fabrication additive, le procédé laser beam melting (LBM) permet la conception de formes complexes par une méthode de construction couche par couche, à partir d’un lit de poudre. La compréhension des mécanismes de solidification mis en jeu lors de la fabrication est encore trop peu maitrisée pour une optimisation du procédé LBM Ainsi cette étude a pour objectif d’optimiser les caractéristiques des composants issus du procédé LBM. Pour parvenir à notre but, cette étude a été découpée en deux parties : la première a porté sur l’étude de l’influence des paramètres procédés et de la composition d’alliage sur la microstructure des échantillons fabriqués par LBM, tandis que la seconde concernait le développement d’un modèle thermique visant à prédire la microstructure. Au cours de cette étude, des analyses microstructurales et mécaniques ont été menées sur des pièces 3D en acier 316L, construites en faisant varier les paramètres procédés et la composition des poudres. Cette partie a pu mettre en évidence l’influence non négligeable de la composition chimique sur le chemin de solidification de l’alliage, impactant directement la microstructure de solidification donc indirectement, les propriétés mécaniques. Parallèlement à cette étude, le modèle thermique développé a permis d’identifier la structure de solidification et d’estimer la forme et la taille de la zone fondue, en fonction des paramètres procédés utilisés dans la première partie. La compréhension approfondie du mécanisme de solidification rencontré lors du procédé LBM, permet d’émettre des recommandations sur les compositions de la nuance 316L la plus adaptée à ce procédéThe laser beam melting (LBM) is an additive manufacturing process that allows the production of complex samples trough a layer-by-layer melting of the powder bed by the laser beam. In the most of the studies, the solidification mechanisms were not studied in details. However, from scientific and practical point of view, it is necessary to study and to describe these mechanisms which can help to optimize the mechanical properties of LBM samples. The purposes of this study were to analyse the influence of process parameters and the powder chemical composition on the microstructure of manufactured parts and to develop a numerical simulation model capable to predict the microstructure of the part after material solidification. In this work, the microstructure and mechanical properties of 316L alloy LBM samples were analysed in dependence on the process parameters and the chemical composition of the powders. The results obtained during the study showed the significant influence of the chemical composition of the powder on the sample microstructure for the same process parameters. It was found that the chemical composition impacts the solidification path of the alloy, the latter can give different microstructure and therefore different mechanical properties. Meanwhile, thanks to thermal model developed, the solidification structure and the shape and size of the melting pool have been identified, according to the process parameters used for the experiment part. Finally, the link between the microstructure observed and the microstructure predicted by the model have been settled, leading to a deeper understanding of the solidification mechanism encountered during the LBM process
Books on the topic "Fabrication additive laser"
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Singh, Rupinder, and J. Paulo Davim. Additive Manufacturing. Taylor & Francis Group, 2021.
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Singh, Rupinder, and J. Paulo Davim. Additive Manufacturing: Applications and Innovations. Taylor & Francis Group, 2018.
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Singh, Rupinder, and J. Paulo Davim. Additive Manufacturing: Applications and Innovations. Taylor & Francis Group, 2018.
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Singh, Rupinder, and J. Paulo Davim. Additive Manufacturing: Applications and Innovations. Taylor & Francis Group, 2018.
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Solid Freeform and Additive Fabrication - 2000. University of Cambridge ESOL Examinations, 2014.
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Dimos, Duane, Stephen C. Danforth, and Michael J. Cima. Solid Freeform and Additive Fabrication: Volume 542. University of Cambridge ESOL Examinations, 2014.
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(Editor), Stephen C. Danforth, Duane Dimos (Editor), and Fritz Prinz (Editor), eds. Solid Freeform and Additive Fabrication-2000: Symposium Held April 24-26, 2000, San Francisco, California, U.S.A (Materials Research Society Symposia Proceedings, V. 625.). Materials Research Society, 2000.
Find full textBook chapters on the topic "Fabrication additive laser"
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Ryabtsev, Igor, Serhii Fomichov, Valerii Kuznetsov, Yevgenia Chvertko, and Anna Banin. "Laser Surfacing." In Surfacing and Additive Technologies in Welded Fabrication, 133–47. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-34390-2_7.
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Kumar, B. Bala Murali, Yun Chung Hsueh, Zhuoyang Xin, and Dan Luo. "Process and Evaluation of Automated Robotic Fabrication System for In-Situ Structure Confinement." In Proceedings of the 2021 DigitalFUTURES, 368–79. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_34.
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AbstractThe additive manufacturing process is gaining momentum in the construction industry with the rapid progression of large-scale 3D printed technologies. An established method of increasing the structural performance of concrete is by wrapping it with Fibre Reinforced Polymer (FRP). This paper proposes a novel additive process to fabricate a FRP formwork by dynamic layer winding of the FRP fabric with epoxy resin paired with an industrial scale robotic arm. A range of prototypes were fabricated to explore and study the fabrication parameters. Based on the systemic exploration, the limitations, the scope, and the feasibility of the proposed additive manufacturing method is studied for large scale customisable structural formworks.
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Loh, Paul, and David Leggett. "Towards a Digital Repertoire: Design and Fabrication of a Robotically-Milled Brass Chandelier." In Computational Design and Robotic Fabrication, 443–52. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8637-6_38.
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AbstractThe paper described the design and fabrication of a robotically-milled brass chandelier using a bespoke vertical axial revolving material holder as a robotic fixture. While the technique described is for a chandelier design, it has potential architectural applications, as demonstrated by architects such as Barkow Leibinger. The significance of this research lies in the increased flexibility of the technique performed using a robotic arm compared to the current industrial method using tubematic laser cutter. In addition, the paper outlined the design of the robotic fixture and the computational workflow to create an integrated design-to-fabrication workflow. The research highlighted robotic systems as a potential design environment through reflection on Material Engagement Theory (MET) framework. Critically, the workflow constructed design feedback as robotic agencies that provide affordances through the fabrication setup. Such affordances contribute to the designing process and refine craftsmanship by creating transactional relationships between tools and material as a digital repertoire. This emerging design environment extends robotic research into design practice.
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Abdulrahman, Kamardeen Olajide, Esther T. Akinlabi, and Rasheedat M. Mahamood. "Additive Manufacturing." In Additive Manufacturing Technologies From an Optimization Perspective, 165–83. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-9167-2.ch008.
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Three-dimensional printing has evolved into an advanced laser additive manufacturing (AM) process with capacity of directly producing parts through CAD model. AM technology parts are fabricated through layer by layer build-up additive process. AM technology cuts down material wastage, reduces buy-to-fly ratio, fabricates complex parts, and repairs damaged old functional components. Titanium aluminide alloys fall under the group of intermetallic compounds known for high temperature applications and display of superior physical and mechanical properties, which made them most sort after in the aeronautic, energy, and automobile industries. Laser metal deposition is an AM process used in the repair and fabrication of solid components but sometimes associated with thermal induced stresses which sometimes led to cracks in deposited parts. This chapter looks at some AM processes with more emphasis on laser metal deposition technique, effect of LMD processing parameters, and preheating of substrate on the physical, microstructural, and mechanical properties of components produced through AM process.
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Paul, Christ P., Arackal N. Jinoop, Saurav K. Nayak, and Alini C. Paul. "Laser Additive Manufacturing in Industry 4.0." In Research Anthology on Cross-Industry Challenges of Industry 4.0, 729–54. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8548-1.ch037.
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Additive manufacturing is one of the nine technologies fuelling the fourth industrial revolution (Industry 4.0). High power lasers augmented with allied digital technologies is changing the entire manufacturing scenario through metal additive manufacturing by providing feature-based design and manufacturing with the technology called laser additive manufacturing (LAM). It enables the fabrication of customized components having complex and lightweight designs with high performance in a short period. The chapter compiles the evolution and global status of LAM technology highlighting its advantages and freedoms for various industrial applications. It discusses how LAM is contributing to Industry 4.0 for the fabrication of customized engineering and prosthetic components through case studies. It compiles research, development, and deployment scenarios of this new technology in developing economies along with the future scope of the technology.
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Paul, Christ P., Arackal N. Jinoop, Saurav K. Nayak, and Alini C. Paul. "Laser Additive Manufacturing in Industry 4.0." In Advances in Civil and Industrial Engineering, 271–95. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-4054-1.ch014.
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Additive manufacturing is one of the nine technologies fuelling the fourth industrial revolution (Industry 4.0). High power lasers augmented with allied digital technologies is changing the entire manufacturing scenario through metal additive manufacturing by providing feature-based design and manufacturing with the technology called laser additive manufacturing (LAM). It enables the fabrication of customized components having complex and lightweight designs with high performance in a short period. The chapter compiles the evolution and global status of LAM technology highlighting its advantages and freedoms for various industrial applications. It discusses how LAM is contributing to Industry 4.0 for the fabrication of customized engineering and prosthetic components through case studies. It compiles research, development, and deployment scenarios of this new technology in developing economies along with the future scope of the technology.
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Mahamood, R. M., and E. T. Akinlabi. "Laser-Assisted Additive Fabrication of Micro-Sized Coatings." In Advances in Laser Materials Processing, 635–64. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-08-101252-9.00021-2.
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Alemohammad, H., and E. Toyserkani. "Laser-assisted additive fabrication of micro-sized coatings." In Advances in Laser Materials Processing, 735–62. Elsevier, 2010. http://dx.doi.org/10.1533/9781845699819.7.735.
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Balasubramanian, K. R., V. Senthilkumar, and Divakar Senthilvel. "Introduction to Additive Manufacturing." In Advances in Civil and Industrial Engineering, 1–24. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-4054-1.ch001.
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Additive manufacturing (AM) is also referred to as 3D printing, rapid prototyping, solid freeform fabrication, rapid manufacturing, desktop manufacturing, direct digital manufacturing, layered manufacturing, generative manufacturing, layered manufacturing, solid free-form fabrication, rapid prototype, tool-less model making, etc. It is emerging as an important manufacturing technology. It is the process of building up of layer-by-layer by depositing a material to make a component using the digital 3D model data. The main advantages of AM are mass customization, minimisation of waste, freedom of designing complex structures, and ability to print large structures. AM is broadly applicable to all classes of materials including metals, ceramics, polymers, composites, and biological systems. The AM methods used for producing complex geometrical shapes are classified based either on energy source (laser, electron beam) used or the material feed stock (powder feed, wire feed).
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Mahamood, Rasheedat M., Esther T. Akinlabi, Mukul Shukla, and Sisa Pityana. "Improving Surface Integrity Using Laser Metal Deposition Process." In Additive Manufacturing, 220–44. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9624-0.ch009.
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Laser Metal Deposition (LMD), an additive manufacturing process (also known as 3-D printing) and a non-traditional fabrication process used for improving the surface integrity of components is presented in this chapter. In LMD, parts are manufactured directly from the 3-D Computer-Aided Design (CAD) model data. Complex parts can be produced in a single step, which is impossible with the traditional manufacturing methods such as casting, cutting, and turning operations. The major steps required in the production of parts using the laser metal deposition process are highlighted. The flexibility offered by the LMD technique makes it an important surface engineering technique. Composite parts or parts whose surfaces are made of composite materials can also be produced in a single step because two or more dissimilar materials can be handled simultaneously in the LMD process to produce parts. This is because the building of parts in LMD is achieved by the LMD machine following the detail described by the CAD model of the part being made. The processing parameters affecting the properties of laser metal deposited parts are described in detail. This chapter establishes the ability of the LMD in the production of complex and one of its kind parts, its ability to improve surface properties, repair high-valued parts, and reduce the buy-to-fly ratio in the production of aerospace parts. It also highlights the use of non-traditional finishing techniques on laser deposited parts to further improve the surface integrity of components. The chapter is concluded by presenting a laser metal deposited Ti6Al4V/TiC composite. The laser metal deposited Ti6Al4V/TiC composite was characterized through the microstructure, microhardness, and wear resistance, and it was found that the resulting deposits were fully dense and of improved surface properties when compared to the parent materials.
Conference papers on the topic "Fabrication additive laser"
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Duocastella, Marti, Ernest Martí-Jerez, and Salvatore Surdo. "Laser additive fabrication of tailored micro-optics." In Laser-based Micro- and Nanoprocessing XVI, edited by Rainer Kling and Akira Watanabe. SPIE, 2022. http://dx.doi.org/10.1117/12.2608835.
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Jenkins, Chris, Jeffrey Whetzal, T. Chase, and J. Sears. "Advanced Mirror Fabrication Using Laser Additive Manufacturing." In Space 2004 Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-5993.
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Kenneth, TanHong Yi, Su Pei-Chen, Sun Chen-Nan, and Wei Jun. "Opportunities for Fabrication of SOFC Anode Using Selective Laser Melting." In 1st International Conference on Progress in Additive Manufacturing. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-0446-3_125.
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Shamrai, Aleksandr V., Aleksandr Tronev, Mikhail Parfenov, Peter Agruzov, and Igor Ilichev. "Fabrication of high-performance lithium niobate photonic integrated circuits using laser microtrimming." In 3D Printed Optics and Additive Photonic Manufacturing, edited by Georg von Freymann, Alois M. Herkommer, and Manuel Flury. SPIE, 2018. http://dx.doi.org/10.1117/12.2306769.
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Zhao, Xiao, Qingsong Wei, Jie Liu, Yusheng Shi, and Zhongwei Li. "Direct Metal Tool Fabrication of AISI 420 Tool Steel by Selective Laser Melting." In 1st International Conference on Progress in Additive Manufacturing. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-0446-3_048.
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Oosterhuis, Gerrit, Bert Huis in't Veld, Gerald Ebberink, Daniel Arnaldo del Cerro, Edwin van den Eijnden, Peter Chall, and Ben van der Zon. "Additive interconnect fabrication by picosecond Laser Induced Forward Transfer." In 2010 IEEE International 3D Systems Integration Conference (3DIC). IEEE, 2010. http://dx.doi.org/10.1109/3dic.2010.5751481.
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Ortiz, Igor, Piera Álvarez, Maria Angeles Montealegre, Francisco Cordovilla, and José Luis Ocaña. "Development of Adaptive Toolpaths for Repair and Cladding of Complex 3D Components by Laser Metal Deposition." In 2022 International Additive Manufacturing Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/iam2022-94946.
Full textAbstract:
Abstract The paper envisages the development of specific toolpaths for additive repair and cladding of full 3D geometry components by the Laser Metal Deposition Additive Manufacturing technique. Due to the essential difference between substractive and additive manufacturing approaches, the use of traditional substractive CAD-CAM programs is hardly suitable for a proper design and manufacturing of 3D additive manufactured AM’d components. The main key points for the development of CAD-CAM tools specifically applicable to Additive Manufacturing - AM processes are the need for an intrinsic process stability in terms of coating and layer growth, the need for a well-tailored additive track overlapping over the whole selected surface area and the need for integration of specific features relative to the laser, addition material and surface properties monitoring and control. The expected result of the full AM process based on the appropriate design tools is an efficient capability to meet not only the full 3D geometry according to the specified tolerances, but, very importantly, the microstructure specifications for the deposited material, avoiding the existence of critical defaults invalidating the fabrication or repair of the component. Moreover, the developed AZALA software must comply with the geometric specifications usual for manufacturing workstations, detecting preventively possible part-tool collisions with part and assuring an overall efficient manufacturing chain.
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Yurevich Gerasimenko, Alexander, Natalia Zhurbina, Ulyana Kurilova, Aleksandr Polokhin, Dmitry Ryabkin, Mikhail Savelyev, Levan Ichkitidze, et al. "The technology of laser fabrication of cell 3D scaffolds based on proteins and carbon nanoparticles." In 3D Printed Optics and Additive Photonic Manufacturing, edited by Georg von Freymann, Alois M. Herkommer, and Manuel Flury. SPIE, 2018. http://dx.doi.org/10.1117/12.2306792.
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Jonušauskas, Linas, Dovile Andrijec, Tomas Baravykas, Agne Butkute, Titas Tičkūnas, Tomas Gadišauskas, and Vytautas Purlys. "Hybrid additive-subtractive femtosecond laser 3D fabrication of medical microdevices (Conference Presentation)." In Laser 3D Manufacturing VII, edited by Henry Helvajian, Bo Gu, and Hongqiang Chen. SPIE, 2020. http://dx.doi.org/10.1117/12.2544578.
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Obata, Kotaro, Shi Bai, and Koji Sugioka. "Additive and subtractive manufacturing process by hybrid laser material processing." In Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIV, edited by Georg von Freymann, Eva Blasco, and Debashis Chanda. SPIE, 2021. http://dx.doi.org/10.1117/12.2579336.
Full textReports on the topic "Fabrication additive laser"
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Plotkowski, Alex. Fabrication and Modeling of Laser Additive Manufactured Materials with Multi-Beam Adaptive Beam Shaping. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1550767.
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