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Letteratura scientifica selezionata sul tema "Wire Arc Additive Manufactoring"

Autore: Grafiati

Pubblicato: 25 gennaio 2025

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Articoli di riviste sul tema "Wire Arc Additive Manufactoring"

Williams, S. W., F. Martina, A. C. Addison, J. Ding, G. Pardal e P. Colegrove. "Wire + Arc Additive Manufacturing". Materials Science and Technology 32, n. 7 (9 febbraio 2016): 641–47. http://dx.doi.org/10.1179/1743284715y.0000000073.

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Casalino, Giuseppe, Mojtaba Karamimoghadam e Nicola Contuzzi. "Metal Wire Additive Manufacturing: A Comparison between Arc Laser and Laser/Arc Heat Sources". Inventions 8, n. 2 (1 marzo 2023): 52. http://dx.doi.org/10.3390/inventions8020052.

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In this paper, the authors introduce the reader to the state of the art of Metal Wire Additive Manufacturing (MWAM) and provide a comparison between Wire Arc Additive Manufacturing (WAAM), Wire Laser Additive Manufacturing (WLAM), and Laser Arc Hybrid Wire Deposition (LAHWD) based on their characteristics and potential future applications, since MWAM is expected to have a promising future in various areas, such as aerospace, automotive, biomedical, and energy fields. A detailed discussion of the benefits and drawbacks of each Metal Wire Additive Manufacturing process can help to improve our understanding of the unique characteristics of metal wire application. Therefore, this paper offers a comprehensive analysis that can serve as a reference for upcoming industrial projects and research initiatives, with the aim of helping industries choose the most appropriate WAM technique for their specific applications.

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Shukla, Pranjal, Balaram Dash, Degala Venkata Kiran e Satish Bukkapatnam. "Arc Behavior in Wire Arc Additive Manufacturing Process". Procedia Manufacturing 48 (2020): 725–29. http://dx.doi.org/10.1016/j.promfg.2020.05.105.

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Lin, Zidong, Pengfei Liu e Xinghua Yu. "A Literature Review on the Wire and Arc Additive Manufacturing—Welding Systems and Software". Science of Advanced Materials 13, n. 8 (1 agosto 2021): 1391–400. http://dx.doi.org/10.1166/sam.2021.3971.

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Wire and arc additive manufacturing (WAAM) is considered to be an economic and efficient technology that is suitable to produce large-scale and ultra-large-scale metallic components. In the past two decades, it has been widely investigated in different fields, such as aerospace, automotive and marine industries. Due to its relatively high deposition rate, material efficiency, and shortened lead time compared to other powder-based additive manufacturing (AM) techniques, wire and arc additive manufacturing (WAAM) has been significantly noticed and adopted by both academic researchers and industrial engineers. In order to summarize the development achievements of wire and arc additive manufacturing (WAAM) in the past few years and outlook the development direction in the coming days, this paper provides an overview of 3D metallic printing by applying it as a deposition method. The review mainly focuses on the current welding systems, software for tool path design, generation, and planning used in wire and arc additive manufacturing (WAAM). In the end, the state of the art and future research on wire and arc additive manufacturing (WAAM) have been prospected.

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Derekar, K. S. "A review of wire arc additive manufacturing and advances in wire arc additive manufacturing of aluminium". Materials Science and Technology 34, n. 8 (8 aprile 2018): 895–916. http://dx.doi.org/10.1080/02670836.2018.1455012.

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Kou, Fan, e Xiaoqiu Huang. "Current Research Situation and Prospect of Wire and Arc Additive Manufacturing of Titanium Alloy". Journal of Engineering System 2, n. 2 (giugno 2024): 39–46. http://dx.doi.org/10.62517/jes.202402207.

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Wire arc additive manufacturing is an important part of additive manufacturing. Because of its low processing cost, high forming efficiency, high material utilization rate and low equipment cost, it is favored in the fields of medical and aerospace. This paper briefly discuss the technologies of titanium alloy wire arc additive manufacturing. The influence of different deposited parameters, interpass rolling, ultrasonic assistance and heat treatment on the forming quality of titanium alloy wire arc additive components are summarized and analyzed. Finally, combined with the actual engineering requirements, the problems and research directions of the development of titanium alloy additive manufacturing are analyzed.

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Liu, Dan, Boyoung Lee, Aleksandr Babkin e Yunlong Chang. "Research Progress of Arc Additive Manufacture Technology". Materials 14, n. 6 (15 marzo 2021): 1415. http://dx.doi.org/10.3390/ma14061415.

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Additive manufacturing technology is a special processing technology that has developed rapidly in the past 30 years. The materials used are divided into powder and wire. Additive manufacturing technology using wire as the material has the advantages of high deposition rate, uniform composition, and high density. It has received increasingly more attention, especially for the high efficiency and rapid prototyping of large-size and complex-shaped components. Wire arc additive manufacturing has its unique advantages. The concept, connotation, and development history of arc additive manufacturing technology in foreign countries are reviewed, and the current research status of arc-based metal additive manufacturing technology is reviewed from the principles, development history, process, and practical application of arc additive manufacturing technology. It focuses on the forming system, forming material, residual stress and pores, and other defect controls of the technology, as well as the current methods of mechanical properties and process quality improvement, and the development prospects of arc additive manufacturing technology are prospected. The results show that the related research work of wire arc additive manufacturing technology is still mainly focused on the experimental research stage and has yet not gone deep into the exploration of the forming mechanism. The research work in this field should be more in-depth and systematic from the physical process of forming the molten pool system from the perspectives of stability, the organization evolution law, and performance optimization. We strive to carry out wire arc additive forming technology and theoretical research to promote the application of this technology in modern manufacturing.

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Wang, Xiaolong, Aimin Wang, Kaixiang Wang e Yuebo Li. "Process stability for GTAW-based additive manufacturing". Rapid Prototyping Journal 25, n. 5 (10 giugno 2019): 809–19. http://dx.doi.org/10.1108/rpj-02-2018-0046.

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Abstract Purpose Traditional gas tungsten arc welding (GTAW) and GTAW-based wire and arc additive manufacturing (WAAM) are notably different. These differences are crucial to the process stability and surface quality in GTAW WAAM. This paper addresses special characteristics and the process control method of GTAW WAAM. The purpose of this paper is to improve the process stability with sensor information fusion in omnidirectional GTAW WAAM process. Design/methodology/approach A wire feed strategy is proposed to achieve an omnidirectional GTAW WAAM process. Thus, a model of welding voltage with welding current and arc length is established. An automatic control system fit to the entire GTAW WAAM process is established using both welding voltage and welding current. The effect of several types of commonly used controllers is examined. To assess the validity of this system, an arc length step experiment, various wire feed speed experiments and a square sample experiment were performed. Findings The research findings show that the resented wire feed strategy and arc length control system can effectively guarantee the stability of the GTAW WAAM process. Originality/value This paper tries to make a foundation work to achieve omnidirectional welding and process stability of GTAW WAAM through wire feed geometry analysis and sensor information fusion control model. The proposed wire feed strategy is implementable and practical, and a novel sensor fusion control method has been developed in the study for varying current GTAW WAAM process.

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Guo, Chun, Maoxue Liu, Ruizhang Hu, Tuoyu Yang, Baoli Wei, Feng Chen e Liyong Zhang. "High-strength wire + arc additive manufactured steel". International Journal of Materials Research 111, n. 4 (1 maggio 2020): 325–31. http://dx.doi.org/10.1515/ijmr-2020-1110408.

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Abstract High-strength 690-MPa steel was prepared using a wire + arc additive manufacturing (WAAM) technology. The phase composition, microstructure, and crystal structure of highstrength 690-MPa steel samples were analysed, and the results show that a sample prepared using WAAM technology achieves a good formation quality. The metallographic structure was mainly acicular ferrite, massive ferrite, and granular bainite. The microhardness distribution of the vertical and horizontal sections of the samples is uniform. Excellent mechanical properties of the specimen were shown, including a horizontal yield strength of 536 MPa, a tensile strength of 760 MPa, an elongation of 23.5%, a Charpy impact value of 70 J at -508C, a vertical yield strength of 486 MPa, a tensile strength of 758 MPa, an elongation of 21.5%, and a Charpy impact value of 51 J at -508C.

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Klobcar, Damjan, Drago Bračun, Mirko Soković, Matija Bušić, S. Baloš e Matej Pleterski. "Important findings in Wire + Arc Additive Manufacturing". Zavarivanje i zavarene konstrukcije 64, n. 3 (2019): 123–31. http://dx.doi.org/10.5937/zzk1903123k.

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Più fonti

Tesi sul tema "Wire Arc Additive Manufactoring"

Sazerat, Marjolaine. "Fabrication additive arc-fil (WAAM) pour la réparation de composants aéronautiques en Waspaloy : caractérisation microstructurale, mécanique et vieillissement métallurgique". Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0024.

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Le procédé de soudage Cold Metal Transfer (CMT) est envisagé comme un moyen de réparation additive pour les pièces de grandes dimensions. Cette technologie offre un taux de dépôt élevé avec un apport de chaleur réduit en raison du transfert de matière en régime de court-circuit. Son utilisation permettrait de réduire considérablement les temps d’opération liés à la maintenance, réparation et révision (MRO). Le Waspaloy, superalliage base Ni polycristallin durci par précipitation γ', est communément utilisé dans les parties chaudes des turboréacteurs. Il est, toutefois, considéré marginalement soudable en raison de sa forte teneur en aluminium et en titane. Cette particularité mène à un manque de données dans la littérature scientifique sur ce couple matériau/procédé. Ces travaux de thèse, menés à l’Institut P’ et en collaboration avec le site de MRO de Safran Aircraft Engines (Châtellerault), ont été dédiés à l’étude du Waspaloy CMT. Le premier axe d’analyse a été la caractérisation, à la fois microstructurale et mécanique, du matériau à l’état brut de fabrication. La structure granulaire et dendritique est présentée, de même que la précipitation γ' hétérogène entre les cœurs de dendrite et les espaces interdendritiques. La ségrégation chimique qui en est responsable est mise en évidence, et les propriétés mécaniques monotones, en traction et en fluage jusqu’à 850 °C, sont évaluées. Ensuite, avec l’intention d’optimiser la microstructure hétérogène par un traitement thermique post-soudage différent de celui préconisé pour le matériau forgé, un deuxième axe s’est dégagé autour de la stabilité thermique du Waspaloy CMT. Le grossissement des précipités γ' et les cinétiques de vieillissement sont approchés par la théorie de Lifshitz-Slyozov-Wagner. La formation de phases secondaires est observée, avec l’identification de carbures M23C6 par leur nature chimique et cristalline. Des diagrammes temps-température-transformation expérimentaux sont établis. La question de l’équilibre thermodynamique est abordée par l’application d’un revenu long, et numériquement par des simulations Thermo-Calc®. L’effet du traitement thermique de revenu sur le comportement en traction et en fluage est étudié, en comparaison avec le Waspaloy CMT brut de fabrication et le matériau forgé de référence. Les liens entre les propriétés obtenues et les évolutions microstructurales sont mis en lumière. L’investigation de la tenue mécanique de l’interface entre le substrat forgé et le rechargement CMT s’est également imposée
Cold Metal Transfer (CMT), a wire arc welding process, is being contemplated as a means of additive repair for large aeronautical components. This technology offers a high deposition rate with reduced heat input due to short-circuit material transfer. Its use would considerably reduce maintenance, repair and overhaul (MRO) times. Waspaloy, a γ' precipitation-hardened polycrystalline Ni-based superalloy, is commonly used in the hot sections of jet engines. It is, however, considered marginally weldable due to its high aluminum and titanium content. This particularity leads to a lack of data in the scientific literature on this material/process pair. This thesis work, carried out at the Institut P' and in collaboration with the MRO center of Safran Aircraft Engines (Châtellerault), was dedicated to the study of CMT Waspaloy. The first axis of analysis was the characterization, both microstructural and mechanical, of the material in its as-built state. The granular and dendritic structure is presented, as is the heterogeneous γ' precipitation between dendrite cores and interdendritic spaces. The chemical segregation responsible for this is highlighted, and the monotonic mechanical properties up to 850°C, through both tensile and creep testing, are evaluated. Then, with the intention of optimizing the out-of-equilibrium microstructure by a post-weld heat treatment different from that recommended for the wrought material, a second focus emerged around the thermal stability of CMT Waspaloy. γ' precipitation coarsening and aging kinetics are approximated using the Lifshitz-Slyozov-Wagner theory. The formation of secondary phases is observed, with the identification of M23C6 carbides by their chemical and crystalline nature. Experimental time-temperature-transformation diagrams are established. The question of thermodynamic equilibrium is addressed through the application of a long ageing heat treatment, and numerically through Thermo-Calc® simulations. The effect of ageing on tensile and creep behavior is investigated, in comparison with as-built CMT Waspaloy and the reference wrought material. The links between the resulting properties and microstructural evolutions are highlighted. The mechanical strength of the interface between the wrought substrate and the CMT refurbishment is also investigated

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Sequeira, Almeida P. M. "Process control and development in wire and arc additive manufacturing". Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7845.

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This thesis describes advancements in the modelling, optimisation, process control and mechanical performance of novel high deposition rate gas metal arc welding processes for large scale additive manufacturing applications. One of the main objectives of this study was to develop fundamental understanding of the mechanisms involved during processing with particular focus on single layer welds made of carbon steel using both pulsed-current gas metal arc welding and cold metal transfer processes. The effects of interactions between critical welding process variables and weld bead and plate fusion characteristics are studied for single and multi-layers. It was shown that several bead and plate fusion characteristics are strongly affected by the contact tip to work distance, TRIM, wire feed speed, wire feed speed to travel speed ratio, and wire diameter in pulsed-current gas metal arc welding. The arc-length control, dynamic correction and the contact tip to work distance are shown to strongly influence the weld bead geometry in the cold metal transfer process. This fundamental knowledge was essential to ensure the successful development of predictive interaction models capable of determining the weld bead geometry from the welding process parameters. The models were developed using the least-squares analysis and multiple linear regression method. The gas tungsten constricted arc welding process was utilised for the first time for out-of-chamber fabrication of a large scale and high-quality Ti-6Al-4V component. The main focus was, however, in the use of the cold metal transfer process for improving out-of-chamber deposition of Ti-6Al-4V at much higher deposition rates. The effect of the cold metal transfer process on the grain refinement features in the fusion zone of single layer welds under different torch gas shielding conditions was investigated. It was shown that significant grain refinement occurs with increasing helium content. The morphological features and static mechanical performance of the resulting multi-layered Ti-6Al-4V walls were also examined and compared with those in gas tungsten constricted arc welding. The results show that a considerable improvement in static tensile properties is obtained in both testing directions with cold metal transfer over gas tungsten constricted arc welding. It was suggested that this improvement in the mechanical behaviour could be due to the formation of more fine-grained structures,which are therefore more isotropic. The average ultimate tensile strength and yield strength of the as-deposited Ti-6Al-4V material processed via cold metal transfer meet the minima specification values recommended for most Ti-6Al-4V products. Neutron diffraction technique was used to establish the effect of repeated thermo-mechanical cycling on the generation, evolution and distribution of residual stresses during wire and arc additive manufacturing. The results show a significant redistribution of longitudinal residual stresses along both the substrate and multi-bead with repeated deposition. However, a nearly complete relaxation occurs along the built, once the base plate constraint is removed.

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Ding, J. "Thermo-mechanical analysis of wire and arc additive manufacturing process". Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7897.

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Conventional manufacturing processes often require a large amount of machining and cannot satisfy the continuously increasing requirements of a sustainable, low cost, and environmentally friendly modern industry. Thus, Additive Manufacturing (AM) has become an important industrial process for the manufacture of custom-made metal workpieces. Among the different AM processes, Wire and Arc Additive Manufacture (WAAM) has the ability to manufacture large, low volume metal work-pieces due to its high deposition rate. In this process, 3D metallic components are built by depositing beads of weld metal in a layer by layer fashion. However, the non-uniform expansion and contraction of the material during the thermal cycle results in residual stresses and distortion. To obtain a better understanding of the thermo-mechanical performance of the WAAM process, a study based on FE simulation was untaken in this thesis. The mechanism of the stress generation during the deposition process was analysed via a 3D transient thermo-mechanical FE model which is verified with experimental results. To be capable of analysing the thermo-mechanical behaviour of large-scale WAAM components, an efficient FE approach was developed which can significantly reduce the computational time. The accuracy of this model was validated against the transient model as well as experimental measurements. With the help of the FE models studies on different deposition parameters, deposition sequences and deposition strategies were carried out. It has been proved that the residual stresses and the distortions are possible to be reduced by using optimised deposition parameters and sequences. In addition, a robot path generation prototype has been developed to help efficiently integrate these optimised process settings in the real-wold WAAM process.

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Karlsson, Mattias, e Axel Magnusson. "Wire and Arc Additive Manufacturing : Pre printing strategy for torque arm". Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79176.

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Wire and Arc Additive Manufacturing (WAAM) is a novel Additive manufacturing method. It is a high deposition rate process which can be suitable for producing low to medium quantities of medium to large sized components. Because it is such a novel method, there are still somechallenges to solve for the method to be useful. This project have been focusing on how to dealwith these challenges and how to manufacture a torque arm with WAAM. This includes the process on how to go from a CAD model to a printed product. Tests have been done during the project parallel with the design of the torque arm. The design have been modied according to the results from the tests. The result of the project was a more specic description how the softwares can be used to optimizethe process for a successful print. The used slicing software, Simplify3D, have some limitations and other options should be considered. Some limitations for the part design have been identied and some known challenges have been solved. The torque arm was successfully printed but with more time and refinement, the added offset could be reduced. The process was time consuming and needs to be more automated in the future. Some proposals on what should be further tested and evaluated is also stated in this report.

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Jonsson, Vannucci Tomas. "Investigating the Part Programming Process for Wire and Arc Additive Manufacturing". Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74291.

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Wire and Arc Additive Manufacturing is a novel Additive Manufacturing technology. As a result, the process for progressing from a solid model to manufacturing code, i.e. the Part Programming process, is undeveloped. In this report the Part Programming process, unique for Wire and Arc Additive Manufacturing, has been investigated to answer three questions; What is the Part Programming process for Wire and Arc Additive Manufacturing? What are the requirements on the Part Programming process? What software can be used for the Part Programming process? With a systematic review of publications on Wire and Arc Additive Manufacturing and related subjects, the steps of the Part Programming process and its requirements have been clarified. The Part Programming process has been used for evaluation of software solutions, resulting in multiple recommendations for implemented usage. Verification of assumptions, made by the systematic review, has been done by physical experiments to give further credibility to the results.

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Graf, Marcel, Andre Hälsig, Kevin Höfer, Birgit Awiszus e Peter Mayr. "Thermo-Mechanical Modelling of Wire-Arc Additive Manufacturing (WAAM) of Semi-Finished Products". MDPI AG, 2018. https://monarch.qucosa.de/id/qucosa%3A33161.

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Additive manufacturing processes have been investigated for some years, and are commonly used industrially in the field of plastics for small- and medium-sized series. The use of metallic deposition material has been intensively studied on the laboratory scale, but the numerical prediction is not yet state of the art. This paper examines numerical approaches for predicting temperature fields, distortions, and mechanical properties using the Finite Element (FE) software MSC Marc. For process mapping, the filler materials G4Si1 (1.5130) for steel, and AZ31 for magnesium, were first characterized in terms of thermo-physical and thermo-mechanical properties with process-relevant cast microstructure. These material parameters are necessary for a detailed thermo-mechanical coupled Finite Element Method (FEM). The focus of the investigations was on the numerical analysis of the influence of the wire feed (2.5–5.0 m/min) and the weld path orientation (unidirectional or continuous) on the temperature evolution for multi-layered walls of miscellaneous materials. For the calibration of the numerical model, the real welding experiments were carried out using the gas-metal arc-welding process—cold metal transfer (CMT) technology. A uniform wall geometry can be produced with a continuous welding path, because a more homogeneous temperature distribution results.

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Koskenniemi, Isak. "Preparing parts for Wire and Arc Additive Manufacturing (WAAM) and net-shape machining". Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74296.

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WAAM is a relatively unexplored additive manufacturing method. Although research in this area has been performed for some years and the hardware is relatively cheap, the method is not widely used. As the name suggest, it uses wire and an arc welding equipment to deposit beads on top of each other to create a geometry. As WAAM is a near net-shape method, the parts must be machined to its net-shape after the beads has been deposited. BAE Systems Hägglunds AB are investigating the use of WAAM in an industrial robot cell and this Master’s thesis has been written with the purpose of enabling the use of WAAM for manufacturing parts at the company. This report investigates how a part is prepared for WAAM and near net-shape machining. A formula for approximating the cost of manufacturing a part is investigated. A software for slicing a .STL file for generating a toolpath is developed in Matlab. The software then exports the toolpath to a code that the robot can read. It can also generate a digital model of the work piece for net-shape machining through CATIA macro. A model for calculating the cost of using the WAAM-cell once the toolpath for a part is known is presented. The investigated areas and the developed software are then applied to a part, and the results of the report is discussed.

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Machado, Duarte Jéssica. "Experimental and numerical studies on Wire-and-Arc Additively Manufactured stainless steel rods". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Additive manufacturing has gained worldwide popularity due to its numerous benefits, which includes structural efficiency, reduction of material consumption and wastage, enhanced customisation, improved accuracy and safety on-site. Among the various categories of the additive manufacturing process, Wire and arc additive manufacturing (WAAM) has proven its ability of producing medium to large scale components. However, there is still a lack of knowledge regarding the structural response and mechanical properties of WAAM-produced elements. This paper provides results of numerical and experimental studies on WAAM rods produces using a commercial ER308LSi stainless steel welding wire. The aim is to evaluate the effect of initial imperfections and material mechanical properties on the response of such rods under compression. Tensile and compression tests were carried out in order to determine the mechanical properties of the rods. Subsequently, numerical simulations were performed in order to simulate the mechanical response of the rods under different conditions.

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Chu, Jeffrey B. (Jeffrey Bowen). "Investigating the feasibility and impact of integrating wire-arc additive manufacturing in aerospace tooling applications". Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/126954.

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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 65-67).
The use of wire-arc additive manufacturing (WAAM) as fabrication method for Iron-Nickel 36 (Invar36) alloy aerospace tooling is a growing area of interest for many tooling companies and composite aircraft manufacturers. However, the full adoption and utilization of WAAM techniques is hindered due to lack of industry experience and end-part quality precedent. For some tool makers, the feasibility of utilizing additively manufactured Invar components is still under investigation because key material characteristics of end-parts are not well understood. Further, the impact of implementing additive manufacturing on a manufacturer's internal operations is not widely documented. While much academic research has been conducted on WAAM technologies, Invar, and change management for new technology introductions, much of the available literature does not provide the specificity needed to supplant an aerospace toolmakers' need for hands-on experience. This research will investigate both the technical feasibility of using WAAM Invar components (with respect to end-part quality and performance) in aerospace tool fabrication, as well as the organizational feasibility and impact of adopting the technology. This thesis will describe the series of testing completed to evaluate WAAM Invar in the context of an aerospace toolmaker and will outline some of the key organizational impacts that must be acknowledged for adoption of additive manufacturing within an aerospace tool making company. Because of this research, we hope to demonstrate the viability of utilizing WAAM Invar for aerospace tooling applications.
by Jeffrey B. Chu.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering

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Arrè, Lidiana. "Design, fabrication and mechanical characterization studies on Wire and Arc Additively Manufactured (WAAM) diagrid elements". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25666/.

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The design approach changed in the last decades with the innovation offered by software for Computer-Aided Design (CAD), three-dimensional computer modelling and digital fabrication methods enabling new forms. The development in digital fabrication techniques led to the application of automatic processes in the structural engineering sector through Additive Manufacturing (AM) based technologies. It offers numerous benefits over conventional manufacturing methods, such as design of more complex and optimized components due to greater freedoms in shape and geometry, therefore bringing to a reduced material usage and shortened build times. The focus of this research is on the metal additive manufacturing methods, in particular, the adopted technique is the Wire-and-Arc Additive Manufacturing (WAAM), which best suits the possibility to realize large-scale metal structures and to allow new geometric forms. WAAM advantages compared to the other processes are fast large-scale production, freedoms in shape and geometry, structural efficiency with reduced material usage. The current research comprises the overarching process from the computational design to the mechanical characterization of the WAAM-produced elements, through the fabrication step. The computational design and fabrication stages were carried out at Technische Universität Braunschweig. There is still limited research focused on the characterization of WAAM-produced metal elements for structural engineering applications, therefore the research carried out at University of Bologna was focused on the establishment of 3D-outcome mechanical properties, pointing up the influence of surface roughness and imperfections on the mechanical response, together with the study on how the intersection between WAAM-produced bars influences the overall behavior of the specimen.

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Più fonti

Libri sul tema "Wire Arc Additive Manufactoring"

Rathee, Sandeep, e Manu Srivastava. Wire Arc Additive Manufacturing. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415.

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Borg Costanzi, Christopher. Reinforcing and Detailing of Thin Sheet Metal Using Wire Arc Additive Manufacturing as an Application in Facades. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-41540-2.

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Wire Arc Additive Manufacturing: Fundamental Sciences and Advances. Taylor & Francis Group, 2024.

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Wire Arc Additive Manufacturing: Fundamental Sciences and Advances. Taylor & Francis Group, 2024.

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Wire Arc Additive Manufacturing: Fundamental Sciences and Advances. Taylor & Francis Group, 2024.

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Wire Arc Additive Manufacturing: Fundamental Science and Advances. CRC Press LLC, 2024.

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Costanzi, Christopher Borg. Reinforcing and Detailing of Thin Sheet Metal Using Wire Arc Additive Manufacturing As an Application in Facades. Springer Fachmedien Wiesbaden GmbH, 2023.

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Capitoli di libri sul tema "Wire Arc Additive Manufactoring"

Singh, Amritbir, Himanshu Kumar e S. Shiva. "Additive Manufacturing". In Wire Arc Additive Manufacturing, 1–24. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-1.

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Le, Van Thao, e Tat Khoa Doan. "Wire Arc Additive Manufacturing". In Wire Arc Additive Manufacturing, 25–39. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-2.

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Borg Costanzi, Christopher. "Wire Arc Additive Manufacturing". In Reinforcing and Detailing of Thin Sheet Metal Using Wire Arc Additive Manufacturing as an Application in Facades, 61–84. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-41540-2_4.

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Sharma, Sumit K., Gyan Sagar, Kashif Hasan Kazmi e Amarish Kumar Shukla. "Wire arc additive manufacturing". In Thermal Claddings for Engineering Applications, 277–97. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781032713830-13.

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Kumar, Basant, Sheikh Nazir Ahmad, Sandeep Rathee e Manu Srivastava. "Wire Arc Additive Manufacturing of Non-ferrous Alloys". In Wire Arc Additive Manufacturing, 139–55. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-7.

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Yadav, Ashish, Manu Srivastava, Prashant K. Jain e Sandeep Rathee. "Mechanical Properties of Multi-layer Wall Structure Fabricated through Arc-Based DED Process". In Wire Arc Additive Manufacturing, 213–21. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-11.

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Tomar, Bunty, e S. Shiva. "Process Planning and Parameters Selection in Wire Arc Additive Manufacturing". In Wire Arc Additive Manufacturing, 40–53. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-3.

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Tomar, Bunty, e S. Shiva. "Cold Metal Transfer-Based Wire and Arc Additive Manufacturing (CMT-WAAM)". In Wire Arc Additive Manufacturing, 71–88. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-5.

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Omiyale, Babatunde Olamide. "Influence of Post-Processing Manufacturing Techniques on Wire Arc Additive Manufacturing of Ti-6Al-4V Components". In Wire Arc Additive Manufacturing, 194–212. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-10.

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Nabi, Shazman, Sandeep Rathee, M. F. Wani e Manu Srivastava. "Wire Arc Additive Manufacturing through GMAW Route". In Wire Arc Additive Manufacturing, 54–70. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003363415-4.

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Atti di convegni sul tema "Wire Arc Additive Manufactoring"

Biswas, Preesat, Akula Rajitha, V. Revathi, H. Pal Thethi, Safaa Halool Mohammed e Dinesh Kumar Yadav. "Revolutionizing Wire Arc Additive Manufacturing: Advances in Geometric Accuracy and Surface Finish Optimization". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10687444.

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Krein, Ronny, e Vadym Sushko. "Wire Arc Additive Manufacturing of Creep Strength Enhanced Ferritic Steels and Nickel Alloys". In AM-EPRI 2024, 495–506. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0495.

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Abstract Additive manufacturing is a groundbreaking manufacturing method that enables nearly lossless processing of high-value materials and produces complex components with a level of flexibility that traditional methods cannot achieve. Wire arc additive manufacturing (WAAM), utilizing a conventional welding process such as gas metal arc welding, is one of the most efficient additive manufacturing technologies. The WAAM process is fully automated and guided by CAD/CAM systems on robotic or CNC welding platforms. This paper explores the fundamental concepts and metallurgical characteristics of WAAM. It focuses primarily on the mechanical properties of printed sample structures made from P91, X20, and alloys 625 and 718 wire feedstock. The study particularly addresses the anisotropy of mechanical properties through both short-term and long-term testing, comparing these results to materials processed using conventional methods.

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Diao, Z., F. Yang, H. Li, L. Chen, R. Wang e M. Rong. "Numerical simulation of arc characteristics and multi-layer deposition of Cu alloys fabricated by wire arc additive manufacturing". In 2024 IEEE International Conference on Plasma Science (ICOPS), 1. IEEE, 2024. http://dx.doi.org/10.1109/icops58192.2024.10626239.

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Yan, Hongjun, Kai Qin, Yu Sun, Yangying Jiang, Lijun Ren e Jianliang Tang. "Influence of CaF2 on the microstructure and properties of wire-arc additive manufactured TA15". In 10th International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2024), a cura di Yunhui Liu e Zili Li, 207. SPIE, 2024. http://dx.doi.org/10.1117/12.3047254.

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Al Zaidi, Hussein Oraibi Hawi, S. Vinod Kumar, Vijilius Helena Raj, Sorabh Lakhanpal, Dinesh Kumar Yadav e K. Neelima. "Overcoming Distortion and Residual Stress Challenges in Wire Arc Additive Manufacturing through Advanced Process Control". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10687570.

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Rautio, Timo, Mikko Hietala, Matias Jaskari e Antti Järvenpää. "Comparative Study of Microstructural and Mechanical Properties of Wire Arc Additive Manufactured 316L Stainless Steel". In 2024 International Conference on Power, Energy and Innovations (ICPEI), 191–95. IEEE, 2024. http://dx.doi.org/10.1109/icpei61831.2024.10748616.

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Nagpal, Amandeep, V. Alekhya, B. Swathi, A. Sravani, Ashwani Kumar e Maytham Razaq Shleghm. "Transforming Wire Arc Additive Manufacturing: A Novel Approach to Achieving High Deposition Rates with Reduced Costs". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10688335.

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Nijhawan, Ginni, G. Lalitha, V. Asha, V. J. Suresh, Praveen e Zahraa H. Abdulzahraa. "The Future of Wire Arc Additive Manufacturing Comprehensive Strategies for Improved Close Loop Monitoring and Control". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10687734.

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Nagpal, Amandeep, Akula Rajitha, Aravinda K, G. Gouthami, Ravi Kalra e Namaat R. Abdulla. "Breaking Barriers in Wire Arc Additive Manufacturing: Innovative Solutions for Enhanced Geometrical Accuracy and Surface Quality". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10688110.

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Abdullah, Falah Hassan, Kilaru Aswini, Manjunatha, H. Pal Thethi, Ashish Parmar e B. Ganga Bhavani. "Redefining the Landscape of Wire Arc Additive Manufacturing: Pioneering Innovations for Residual Stress Mitigation and Process Efficiency". In 2024 OPJU International Technology Conference (OTCON) on Smart Computing for Innovation and Advancement in Industry 4.0, 1–6. IEEE, 2024. http://dx.doi.org/10.1109/otcon60325.2024.10688195.

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Rapporti di organizzazioni sul tema "Wire Arc Additive Manufactoring"

Korinko, P., A. Duncan, A. D'Entremont, P. Lam, E. Kriikku, J. Bobbitt, W. Housley, M. Folsom e (USC), A. WIRE ARC ADDITIVE MANUFACTURING. Office of Scientific and Technical Information (OSTI), settembre 2018. http://dx.doi.org/10.2172/1475286.

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Elmer, J., e G. Gibbs. Wire Arc Additive Manufacturing Final Report for the Wire-Based AM Focused Exchange. Office of Scientific and Technical Information (OSTI), novembre 2018. http://dx.doi.org/10.2172/1809158.

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Nycz, Andrzej, Clint Wildash, Yukinori Yamamoto, Luke Meyer, Derek Vaughan, Andres Marquez Rossy e Donovan Leonard. Multi material/functionally graded wire arc additive manufacturing of high strength steel valves clad with nickel alloy 625 used for oil extraction. Office of Scientific and Technical Information (OSTI), settembre 2022. http://dx.doi.org/10.2172/1992746.

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MATERIAL PROPERTIES AND LOCAL STABILITY OF WAAM STAINLESS STEEL PLATES WITH DIFFERENT DEPOSITION RATES. The Hong Kong Institute of Steel Construction, agosto 2022. http://dx.doi.org/10.18057/icass2020.p.244.

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Wire arc additive manufacturing (WAAM) has significant potential to produce freeform, but structurally efficient geometries out of stainless steel, for use in the construction industry, however, there is currently no standardisation of the manufacturing parameters used to produce WAAM structures. This paper discusses an experimental programme carried out on WAAM 316L stainless steel plated structures to assess the effects of the deposition rate, which is directly associated with productivity. This programme comprises tensile tests on coupons extracted along different printing directions, geometric imperfection measurement (including surface roughness, waviness and overall out-of-straightness), and stub column tests designed to determine the local stability of unstiffened plates manufactured with different deposition rates. The applicability of current Eurocode design rules for stainless steel structures, including the ductility requirements and effective width equations, have been assessed based on the obtained experimental data.

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A PRELIMINARY STUDY OF DEPOSITION RATE, MATERIAL PROPERTY AND STABILITY OF WAAM STAINLESS STEEL PLATES. The Hong Kong Institute of Steel Construction, marzo 2023. http://dx.doi.org/10.18057/ijasc.2023.19.1.4.

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