Relevant bibliographies by topics / Effects of process parameters on microstructure and texture

Academic literature on the topic 'Effects of process parameters on microstructure and texture'

Author: Grafiati
Published: 8 June 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Journal articles on the topic "Effects of process parameters on microstructure and texture":

1

Fischer, Tim, Leonhard Hitzler, and Ewald Werner. "Morphological and Crystallographic Effects in the Laser Powder-Bed Fused Stainless Steel Microstructure." Crystals 11, no. 6 (June 10, 2021): 672. http://dx.doi.org/10.3390/cryst11060672.

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One of the key aspects in additive manufacturing of stainless steels is the relationship between process parameters and the resulting microstructure. The selected process parameters typically cause a rapid solidification of the material, which leads to a microstructure that is highly textured both morphologically and crystallographically. While the morphological texture is characterised by a mainly columnar shape of the grains, the crystallographic texture is marked by a preferred grain orientation in the <001> direction (fibre texture). Due to the texture effects, pronounced anisotropic mechanical properties are present in the material. In this report, a series of virtual microstructures with different morphological and crystallographic features are generated to develop a fundamental understanding of the individual texture effects on the mechanical properties. The grain morphology is based on Voronoi tessellations, and the crystallographic texture is captured with crystal plasticity. Furthermore, the numerical predictions are compared with experimental studies. The mechanical properties predicted on the basis of the virtual microstructures show that the crystallographic effect is much more dominant than the morphology of the individual grains. Consistent with the experiments, the highest load-bearing capacity of the material occurs when the macroscopic loading acts under an angle of 45∘ to the preferred orientation of the crystals.
2

Kosović, Indira, Indira Kosović, Mirta Benšić, Mirta Benšić, Đurđica Ačkar, Đurđica Ačkar, Antun Jozinović, et al. "Microstructure and cooking quality of barley-enriched pasta produced at different process parameters." Foods and Raw Materials 6, no. 2 (December 20, 2018): 281–90. http://dx.doi.org/10.21603/2308-4057-2018-2-281-290.

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Pasta is one of the most popular meals in the world. It is affordable, easy to combine with other foods and easy to cook. Unfortunately, pasta is energy-rich and nutrient-poor. Whole-wheat pasta is somewhat better in nutritional quality, but further improvements may be made. One option is to add different raw materials and specific nutritive components (vitamins, polyphenols, fiber, protein, etc.) to semolina. However, this approach changes its physico-chemical properties, e.g. cooking loss, texture, etc., which cannot be disregarded. The current research investigates possibilities for production of barley-enriched pasta with acceptable cooking qualities. To ensure the beneficial health effects of β-glucan, β-glucan-rich barley was selected asa starting material. Pasta enriched with 10–50% β-glucan-rich barley flour was produced in the mini-press and the laboratory extruder and then dried at low, medium and high temperature regimes. Colour, cooking quality and microstructure of the enriched pasta were investigated to determine its acceptability. The research showed that barley-enriched pasta of good cooking quality might be produced by selecting an optimal combination of suitable production parameters for forming and drying.
3

Chen, Zhen, Pei Wei, Hanfeng Chen, Xinggang Chen, Yi Ruan, Wenzheng Zhou, and Sujun Lu. "Laser Powder Bed Fusion of K418 Superalloy: Process, Microstructure, Texture Feature, and Mechanical Property." Metals 12, no. 4 (April 1, 2022): 611. http://dx.doi.org/10.3390/met12040611.

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Laser Powder Bed Fusion (LPBF) is one of the most promising additive manufacturing (AM) technologies using metal powders. It has been increasingly applied in variety of industrial and engineering fields, including but not limited to aviation, aerospace, nuclear energy, automobiles, medical, molding, shipping, and so on. In this work, the influence of laser process parameters on the microstructure, textural features, and their resulting effect on the macroscopic mechanical properties of LPBF-manufactured K418 samples was investigated experimentally. OM, SEM, and X-ray diffraction were used to characterize the microstructure evolution, and EBSD was used to identify the crystal texture of the as-built K418 samples. The effect relationship between process, microstructure, and properties was investigated using mechanical property testing. Furthermore, the volumetric energy density VED was considered as a comprehensive evaluation index to reflect the effects of the main laser process parameters on the microstructure and mechanical behavior of LPBF-manufactured K418 samples, including scanning speed v, laser power P, layer thickness t, and hatch space H. The results show that as the volumetric energy density VED increases, the microstructure morphology of the LPBF-manufactured K418 sample evolves: clustered columnar grains → coarsened columnar grains → ultrafine columnar grains, and the mechanical properties of the LPBF-manufactured K418 sample improve, owing to the ultrafine elongated columnar grains and a strong {001} <100> cubic texture.
4

Bai, Lin Rui, Guo Min Le, Jin Feng Li, Xue Liu, and Xiu Yan Li. "Effects of Process Parameters on Morphologies and Microstructures of Laser Melting Deposited V-5Cr-5Ti Alloys." Materials Science Forum 913 (February 2018): 227–34. http://dx.doi.org/10.4028/www.scientific.net/msf.913.227.

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V-Cr-Ti alloys are promising structural materials for future nuclear systems. In this study, a laser melting deposition process has been applied to the fabrications of V-5Cr-5Ti alloys. Laser powers of 1200W, 1400W and 1600W, scanning speeds of 400 mm/min and 600 mm/min, and scanning strategies of single directional scanning and dual directional scanning have been applied to investigate the effects on the morphologies and microstructures of formed individual deposits and thin walls. The dual directional scanning is favored for fabricating thin walls with regular shape, comparing to the single directional scanning. Microstructures of the deposits and walls consist of columnar grains and equiaxed grains. Due to the effects on temperature gradients, both the laser powers and deposition duration show significant effects on the microstructural evolutions of the thin wall samples. As the laser power and deposition duration increase, columnar to equiaxed transitions have been observed. The regions containing columnar grains and equiaxed grains have a <100> fiber texture and a random texture, respectively.
5

Bhale, Pranav, Pnina Ari-Gur, Ronald D. Noebe, Yang Ren, Amila Madiligama, Ranjith Devaraj, and Matthew S. Cook. "Effect of Melt-Spinning Parameters on the Structure and Properties of Ni55.5Mn18.8Ga24Si1.7 Heusler Alloy Ribbons." Materials 16, no. 19 (October 7, 2023): 6590. http://dx.doi.org/10.3390/ma16196590.

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Ni–Mn-based Heusler alloys are known to demonstrate magnetic shape memory and giant magnetocaloric effect (MCE). These effects depend on the phases, crystallographic and magnetic phase transitions, and the crystallographic texture characteristics. These structural characteristics, in turn, are a function of the processing parameters. In the current work, Ni55.5Mn18.8Ga24Si1.7 Heusler alloy was processed by melt-spinning under a helium atmosphere. This process results in a fine microstructure. The ribbon that was produced with a narrower nozzle width, faster wheel speed, and higher cast temperature, indicating a faster cooling rate, had double the magnetic entropy change close to room temperature. However, the other ribbon demonstrated a large entropy change over a broader temperature range, extending its usability. The effect of the melt-spinning process parameters on the developing microstructure, crystallographic structure and texture, transformation temperatures, and the magnetic entropy change were studied to explain the difference in magnetocaloric behavior.
6

Merchant, N., J. S. Luo, V. A. Maroni, D. M. Gruen, B. S. Tani, S. Sinha, K. H. Sandhage, and C. A. Craven. "Epitaxial growth of YbBa2Cu3O7−δ films on (100)-oriented MgO and SrTiO3 substrates by oxidation of a liquid alloy precursor." Journal of Materials Research 7, no. 10 (October 1992): 2680–88. http://dx.doi.org/10.1557/jmr.1992.2680.

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Textured superconducting films of YbBa2Cu3O7−δ were grown on single crystals of MgO (100) and SrTiO3 (100) by oxidation of a liquid alloy precursor. The substrates were coated by dipping them in molten YbBa2Cu3 (m.p. ~870 °C). After removal from the melt, the liquid layers on the substrates were oxidized in pure oxygen to form the tetragonal oxide phase, i.e., YbBa2Cu3O7−δ, then annealed at 500 °C to obtain the superconducting orthorhombic phase of the same compound. The microstructure of the films obtained in this way was found to be related to the nature of the substrate as well as to processing variables that included oxidation temperature and oxidation time. Films grown on MgO (100) showed c-axis texture as well as a random growth structure. Films prepared on SrTiO3 (100) showed either a c-axis texture or a mixture of c-axis and a-axis texture. The superconducting properties of the as-prepared films and the effects of key process parameters on film quality and microstructure are presented and discussed.
7

Ting, Valentina J. L., Pat Silcock, Franco Biasioli, and Phil Bremer. "The Physical and Structural Effects of 1-MCP on Four Different Apple Cultivars during Storage." Foods 12, no. 22 (November 7, 2023): 4050. http://dx.doi.org/10.3390/foods12224050.

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The impact of the ethylene inhibitor, 1-methylcyclopropene (1-MCP), on four apple cultivars (Braeburn, Fuji, Jazz and Golden Delicious) over 150 days of storage at 2 °C was assessed. Proton transfer reaction quadrupole mass spectrometry (PTR-QUAD-MS) was used to monitor changes in VOC composition, while texture analysis and X-ray microcomputer tomography (µ-CT) scanning were used to study microstructural changes. The application of 1-MCP on apples reduced VOC emissions, concurrently maintaining a firmer texture compared to the untreated apples at each time point. The µ-CT scanning revealed how changes in specific morphological characteristics such as anisotropy, connectivity and porosity, size and shape, as well as the interconnectivity of intracellular spaces (IS) influenced texture even when porosity was similar. Additionally, this study showed that the porosity and connectivity of IS were associated with VOC emission and increased simultaneously. This study highlights how the morphological parameters of an apple can help explain their ripening process during long-term storage and how their microstructure can influence the release of VOCs.
8

Cho, Hae Seok, Min Hong Kim, and Hyeong Joon Kim. "Preferred orientation and microstructure of Ni-Zn-Cu ferrite thin films deposited by rf magnetron sputtering." Journal of Materials Research 9, no. 9 (September 1994): 2425–33. http://dx.doi.org/10.1557/jmr.1994.2425.

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We have investigated the effects of process parameters such as rf power, substrate, and gas pressure PAr on preferred orientation, microstructure, and magnetic properties of Ni-Zn-Cu ferrite thin films deposited by conventional rf magnetron sputtering. The texture structure was developed in the ferrite films deposited on the SiO2/Si(100) substrate at low rf power conditions. The ferrite film on the Si(111) substrate always had (111) texture irrespective of process parameters due to lattice matching, but the texture of the ferrite film on SiO2/Si(100) changed from (111) to (100) and finally returned to (111) orientation again with decreasing PAr. Such behavior would occur presumably due to the characteristic atomic stacking sequence corresponding to a given condition of the ion bombardment. The ferrite films deposited at low PAr had a denser microstructure consisting of tightly packed columnar grains with a smoother surface, better adhesion to the substrate, and better crystallinity than those at high PAr. Hc‖ of ferrite film deposited at low PAr was larger than that at high PAr and also larger than Hc⊥ of that deposited at the same PAr because larger compressive stress was induced at low PAr than at high PAr.
9

Mandal, G., S. K. Ghosh, D. Chakrabarti, and S. Chatterjee. "Effects of Thermo-mechanical Process Parameters on Microstructure and Crystallographic Texture of High Ni–Mo Ultrahigh Strength Steel." Metallography, Microstructure, and Analysis 7, no. 2 (February 26, 2018): 222–38. http://dx.doi.org/10.1007/s13632-018-0432-7.

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Gu, Yao Xin, and Hong Chao Qiao. "Study of Laser Peening on TiAl Alloy Properties with Different Parameters." Advanced Materials Research 1089 (January 2015): 359–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.359.

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Laser peening is a novel surface treatment process that generates deep compressive residual stresses and microstructural changes and thereby dramatically improves fatigue strength of critical metal aircraft engine parts. In order to study the effects of laser peening on properties of TiAl alloy, Surface micro-hardness, microstructural, residual stress and pole figures before and after laser peening were tested. The experimental results showed that surface micro-hardness increased by 23%. The compressive residual stress increased 20 times. The texture in the normal direction of 8J peened sample showed a strong fiber texture components 10o away. In conclusion, the laser peening could improve properties of TiAl alloy.
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Journal articles

Dissertations / Theses on the topic "Effects of process parameters on microstructure and texture":

1

Sojiphan, Kittichai. "Effects of Very High Power Ultrasonic Additive Manufacturing Process Parameters on Hardness, Microstructure, and Texture of Aluminum 3003-H18 Alloy." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1418667794.

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Thomas, Matthew James. "The effect of thermomechanical process parameters on the microstructure and crystallographic texture evolution of near-α aerospace alloy Timetal®834." Thesis, University of Sheffield, 2007. http://etheses.whiterose.ac.uk/15126/.

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Khabouchi, Amal. "Microstructure, texture et propagation des ondes ultrasonores dans un superalliage à base de nickel fait par fabrication additive." Electronic Thesis or Diss., Université de Lorraine, 2021. https://docnum.univ-lorraine.fr/public/DDOC_T_2021_0349_KHABOUCHI.pdf.

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La fabrication additive est une technique industrielle révolutionnaire qui suscite un intérêt croissant depuis la fin des années 80 et commence petit à petit à remplacer les procédés conventionnels de fabrication, et même à ouvrir des horizons sur la création de nouveaux types de matériaux.Cette importance lui est attribuée grâce à plusieurs spécificités, à savoir la possibilité presque infinie de construire des pièces avec des géométries complexes et la possibilité de mixer plusieurs types de poudres avec des compositions chimiques différentes pour obtenir des matériaux à propriétés bien déterminées selon l’application finale. Ces matériaux sont souvent appelés matériaux à gradation fonctionnelle (functionally graded materials). La fabrication additive permet même de construire des matériaux composites. Elle est à présent utilisée dans presque tous les domaines industriels : aérospatial, médical, automobile ainsi que celui des composants électroniques. L’extension de la fabrication additive aux alliages métalliques est encore plus récente. Au cours des vingt dernières années, de nombreux procédés de fabrication additive métallique ont été développés. On peut citer la fusion laser sur lit de poudre (appelée SLM ou L-PBF), la Construction Laser Additive Directe (CLAD), le frittage sélectif sous laser (SLS), etc. … Bien qu’elle soit une technique très prometteuse, la fabrication additive, surtout la métallique, reste encore mal maîtrisée. Un gros travail technologique a été réalisé pour optimiser les paramètres de fabrication et améliorer les propriétés, notamment mécaniques, des pièces produites. Pour pouvoir exploiter à fond les atouts de la technique, un important effort de recherche reste cependant à faire pour bien comprendre et contrôler les mécanismes fins mis en jeu par les procédés. En conséquence, la communauté scientifique est actuellement très active dans ce domaine et les publications très nombreuses. D’un point de vue métallurgique, deux points apparaissent primordiaux pour la tenue mécanique des pièces. D’une part la présence de porosités, en plus ou moins forte proportion, dans le matériau déposé, qui peut conduire à une diminution de sa résistance. D’autre part, la texturation cristalline inhérente au procédé utilisé, qui se traduit par un comportement mécanique anisotrope. Les travaux de cette thèse se situent dans ce contexte. Ils ont été menés dans le cadre d’une collaboration entre le LEM3 de Metz et le CEA-LIST de Saclay, intégrée dans un programme de recherche et d’innovation plus large liant le CEA-Tech de Lorraine et la Région Lorraine. Le CEA-LIST est spécialisé -entre autres- dans le développement de méthodes de contrôle non destructif (CND) pour détecter la présence de défauts dans des pièces métalliques. Le LEM3 a une compétence particulière dans la quantification et la compréhension des textures cristallines des alliages métalliques liées à leurs conditions d’élaboration. D’un point de vue scientifique, les objectifs de la thèse étaient doubles : d’une part améliorer notre compréhension de la genèse des textures cristallines lors du dépôt d’un alliage métallique par SLM ; d’autre part, évaluer les conséquences de ces textures sur la propagation des ondes ultrasonores utilisées classiquemen t en CND. D’un point de vue plus pratique, la question qui se posait en début de thèse était : l’anisotropie de propagation élastique des ultrasons liée à la texturation cristalline produite par le procédé SLM nécessite-t-elle de revoir le protocole de contrôle non destructif par ultrasons ?
Additive Manufacturing is a revolutionary industrial technique that has attracted increasing interest since the late 1980s and is gradually beginning to replace conventional manufacturing processes, and even to open horizons for the creation of new types of materials. This importance is attributed to it thanks to several specificities, namely the almost infinite possibility of building parts with complex geometries and the possibility of mixing several types of powders with different chemical compositions to obtain materials with well-defined properties depending on the final applications. These materials are often referred to as functionally graded materials. Additive manufacturing is even used to build composite materials. It is now used in almost all industrial fields: aerospace, medical, automotive and electronic components. The extension of additive manufacturing to metal alloys is even more recent. Over the past 20 years, many metal additive manufacturing processes have been developed. Examples include laser powder bed fusion (called SLM or L-PBF), direct additive laser construction (CLAD), selective laser sintering (SLS), etc... Although that it is a very promising technique, additive manufacturing, especially the metallic one, is still poorly controlled. Considerable technological work has been done to optimise the manufacturing parameters and improve the properties, particularly mechanical ones, of the parts produced. However, to fully use the advantages of the technique, a major research effort remains to be made to fully understand and control the fine mechanisms involved in the processes. As a result, the scientific community is currently very active in this field and the publications are very numerous. From a metallurgical point of view, two points seem to be important for the mechanical strength of the parts. On one hand, the presence of porosities, in a greater or lesser proportion, in the deposited material, which can le ad to a decrease in its resistance. On the other hand, the crystalline texturing inherent in the process used, which results in an anisotropic mechanical behaviour. The work of this thesis is in this context. It was conducted as part of a collaboration between the LEM3 in Metz and CEA-LIST in Saclay, integrated within a wider program of research and innovation joining CEA-Tech Lorraine and the Region of Lorraine. The CEA-LIST is specialized -among other things- in the development of non-destructive control methods (NDT) to detect the presence of defects in metal parts. LEM3 has particular competence in quantifying and understanding the crystalline textures of metal alloys related to their elaboration conditions. From a scientific point of view, the objectives of the thesis were twofold: on the one hand, our objective was to improve our understanding of the genesis of crystalline textures during the deposit of a metal alloy by SLM; On the other hand, we aim to evaluate the consequenc es of these textures on the propagation of the ultrasound waves which are traditionally used in CND. From a more practical point of view, the question that arose at the beginning of the thesis was: does the elastic anisotropy of propagation of ultrasound linked to the crystalline texturing produced by the SLM process require a review of the protocol of non-destructive control by ultrasound?
4

Simonelli, Marco. "Microstructure evolution and mechanical properties of selective laser melted Ti-6Al-4V." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/15070.

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Selective laser melting (SLM) has been shown to be an attractive manufacturing route for the production of ??/?? titanium alloys, and in particular Ti-6Al-4V. A thorough understanding of the relationship between the process, microstructure and mechanical properties of the components produced by this technology is however crucial for the establishment of SLM as an alternative manufacturing route. The purpose of the present study is thus to determine the microstructure evolution, crystallographic texture and the mechanical properties of SLM Ti-6Al-4V. The effect of several processing parameters on the density and the microstructure of the SLM samples were initially investigated. It was found that different sets of process parameters can be used to fabricate near fully dense components. It was found that the samples built using the optimised process window consist exclusively of ????? martensitic phase precipitated from prior ?? columnar grains. It was observed that the ?? grain solidification is influenced by the laser scan strategy and that the ?? phase has a strong <001> texture along its grain growth direction. The ????? martensitic laths that originate from the parent ?? grains precipitate according to the Burgers orientation relationship. It was found that ????? laths clusters from the same ?? grain have a specific misorientation that minimise the local shape strain. Texture inheritance across successive deposited layers was also observed and discussed in relation to various variant selection mechanisms. The mechanical properties of as-built and stress relieved SLM Ti-6Al-4V built using the same optimised process parameters were then investigated. It was found that the build orientation affects the tensile properties, and in particular the ductility of the samples. Samples built perpendicularly to the building direction showed higher ductility than those built in the vertical orientation. It was also observed that a stress relief heat treatment was beneficial to the mechanical properties of SLM Ti-6Al-4V. The ductility of the stress relieved samples was indeed higher than those found in the as-built condition. It was found that the predominant fracture mode during tensile testing is inter-granular. In terms of high-cycle fatigue, it was found that SLM Ti-6Al-4V is comparable to HIPed cast Ti-6Al-4V but it has a significantly lower fatigue resistance than that of wrought and annealed alloys. It was observed that porosity and the elongated prior ?? grain boundaries decrease substantially the fatigue life of the components. Cracks propagate either by fatigue striation or ductile tearing mechanisms. Using alternative laser scan strategies it was possible to control the microstructure of the as-built samples. It was observed that the laser scan vector length influences several microstructural features, such as the width of the prior ?? grains and the thickness of the ????? laths. It was found that re-melting the same layer has instead little effect on the microstructure. A novel laser scan strategy characterised by much lower laser power and scan speed than those typically used in SLM enabled finally to fabricate SLM Ti-6Al-4V with a microstructure close to that of conventionally manufactured Ti-6Al-4V. This study investigates for the first time the crystallographic texture evolution in Ti-6Al-4V manufactured by SLM. Further, this research presents for the first time the effect of the characteristic microstructure and crystallographic texture on the mechanical properties and fracture of SLM Ti-6Al-4V. Lastly, for the first time this research shows examples of microstructural control during the SLM fabrication of the same alloy using long laser dwell times.
5

Antonysamy, Alphons Anandaraj. "Microstructure, texture and mechanical property evolution during additive manufacturing of Ti6Al4V alloy for aerospace applications." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/microstructure-texture-and-mechanical-property-evolution-during-additive-manufacturing-of-ti6al4v-alloy-for-aerospace-applications(03c4d403-822a-4bfd-a0f8-ef49eb65e7a0).html.

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Additive Manufacturing (AM) is an innovative manufacturing process which offers near-net shape fabrication of complex components, directly from CAD models, without dies or substantial machining, resulting in a reduction in lead-time, waste, and cost. For example, the buy-to-fly ratio for a titanium component machined from forged billet is typically 10-20:1 compared to 5-7:1 when manufactured by AM. However, the production rates for most AM processes are relatively slow and AM is consequently largely of interest to the aerospace, automotive and biomedical industries. In addition, the solidification conditions in AM with the Ti alloy commonly lead to undesirable coarse columnar primary β grain structures in components. The present research is focused on developing a fundamental understanding of the influence of the processing conditions on microstructure and texture evolution and their resulting effect on the mechanical properties during additive manufacturing with a Ti6Al4V alloy, using three different techniques, namely; 1) Selective laser melting (SLM) process, 2) Electron beam selective melting (EBSM) process and, 3) Wire arc additive manufacturing (WAAM) process. The most important finding in this work was that all the AM processes produced columnar β-grain structures which grow by epitaxial re-growth up through each melted layer. By thermal modelling using TS4D (Thermal Simulation in 4 Dimensions), it has been shown that the melt pool size increased and the cooling rate decreased from SLM to EBSM and to the WAAM process. The prior β grain size also increased with melt pool size from a finer size in the SLM to a moderate size in EBSM and to huge grains in WAAM that can be seen by eye. However, despite the large difference in power density between the processes, they all had similar G/R (thermal gradient/growth rate) ratios, which were predicted to lie in the columnar growth region in the solidification diagram. The EBSM process showed a pronounced local heterogeneity in the microstructure in local transition areas, when there was a change in geometry; for e.g. change in wall thickness, thin to thick capping section, cross-over’s, V-transitions, etc. By reconstruction of the high temperature β microstructure, it has been shown that all the AM platforms showed primary columnar β grains with a <001>β.

Book chapters on the topic "Effects of process parameters on microstructure and texture":

1

Huang, Shiyao, Mei Li, John E. Allison, Shaorui Zhang, Dayong Li, and Yinghong Peng. "Effects of Direct Extrusion Process on Microstructure, Texture Evolution and Yield Strength of Magnesium Alloy AZ31." In Magnesium Technology 2012, 349–54. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48203-3_64.

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Huang, Shiyao, Mei Li, John E. Allison, Shaorui Zhang, Dayong Li, and Yinghong Peng. "Effects of Direct Extrusion Process on Microstructure, Texture Evolution and Yield Strength of Magnesium Alloy AZ31." In Magnesium Technology 2012, 349–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118359228.ch64.

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Nienaber, Maria, Nabil Safieh, Jan Bohlen, and Noomane Ben Khalifa. "Influence of Process Parameters and Die Design on the Microstructure and Texture Development of Direct Extruded Magnesium Flat Products." In Lecture Notes in Mechanical Engineering, 511–21. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-41023-9_52.

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Wang, Huihui, Wanlin Wang, Hualong Li, Peisheng Lyu, Shengjie Wu, Xueying Lyu, Lulu Song, and Yunli Zhang. "Effects of Normalization Process on Microstructure and Texture of Non-oriented Electrical Steel Produced by Ultra-Thin Strip Casting." In The Minerals, Metals & Materials Series, 875–83. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22524-6_81.

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Marchese, Giulio, Massimo Lorusso, Flaviana Calignano, Elisa Paola Ambrosio, Diego Manfredi, Matteo Pavese, Sara Biamino, Daniele Ugues, Paolo Fino, and Paolo Fino. "Inconel 625 by Direct Metal Laser Sintering: Effects of the Process Parameters and Heat Treatments on Microstructure and Hardness." In Superalloys 2016, 1011–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119075646.ch107.

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Kumar, Manoj. "Modeling and Simulation of Surface Texture for End-Milling Process." In Handbook of Research on Manufacturing Process Modeling and Optimization Strategies, 19–39. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2440-3.ch002.

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Analysis and simulation of manufacturing process require extensive and complicated computations. Nowadays, computer resources and computational algorithms reach to the state that can model and simulate the problem efficiently. One of the important processes in manufacturing is machining. In this research end-milling process which is one of the complex and wide-spread processes in machining is chosen. Most important parameters in end-milling are surface roughness and surface location errors. A comprehensive simulation software is developed to model end-milling process in order to anticipate finishing parameter such as surface roughness and errors. The proposed algorithm takes into account cutting conditions, such as feed, doc, woc, tool run out, etc. In addition, dynamic simulation module of the software can accurately model flexible end-mill tool, the milling cutting forces and regeneration of waviness effects. The software can accurately determine the most commonly used index of surface roughness parameters such as Ra, P.T.V. and surface errors.
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Değirmenci, Ünal. "Investigation of the Effects of Different Cooling/Lubrication Conditions and Cutting Parameters on Energy Consumption During Milling of Hybrid Aluminum Composites." In Interdisciplinary Studies on Contemporary Research Practices in Engineering in the 21st Century II. Özgür Yayınları, 2023. http://dx.doi.org/10.58830/ozgur.pub95.c438.

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In the developing technological world, energy consumption is increasing day by day. Reducing energy consumption on a sectoral basis is very important for sustainable resource use and the improvement of environmental health. The manufacturing sector is one of the sectors where energy consumption is intense. Therefore, even a small improvement in the energy consumption in the machining sector will significantly affect the overall energy consumption, costs, and environmental performance of production systems. Since hybrid aluminum metal matrix composites (AMMC) are difficult to process due to their complex microstructure, energy consumption values during processing are high. For this reason, it is important to determine the most appropriate values by examining the cutting parameters and cooling lubrication conditions during processing to reduce energy consumption. In this article, Al-Gr reinforced hybrid composites containing different proportions of WC and Al2O3 reinforcements were produced. The focus is on the energy consumption when milling these composites under different cooling/lubrication conditions and different machinability parameters such as the dry, minimum amount of lubrication (MQL), and cryogenic-LN2. Taguchi statistical analysis was also used in the experiments. As a result, it was determined that the most effective parameter on the energy consumption values among the control parameters was the feed rate, with a contribution rate of 75.37%. In addition, for minimum energy consumption values, it was observed that the best cutting speed was 150 m/min, the best feed rate was 0.300 mm/rev, and the best cooling/lubrication medium was cryo-LN2 cooling medium.

Conference papers on the topic "Effects of process parameters on microstructure and texture":

1

Zhao, Man, and Steven Y. Liang. "Modeling of Residual Stress in Micro-Grinding Considering Texture Effect." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69724.

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Abstract Residual stress is an important mechanical property parameter and a key evaluation index of the surface integrity. Residual stress induced in micro-grinding is related to the process parameters, the wheel properties, and material microstructure. The micro-grinding process is distinct from the conventional grinding owing to size effect, and the crystal effect. Typically, the effects of crystallographic orientation (CO) on process behaviors are significant by influencing the flow stress of workpiece material due to the depth of cut is usually less than the average grain size. In this paper, a Taylor factor model is developed to estimate the effect of CO on the flow stress and plastic modulus of monocrystalline materials. The flow stress model takes into account strain, strain rate, temperature, and material microstructure including grain size, CO, and dislocation density. The plastic modulus of monocrystalline materials h is given as the function of hardness, strain, and microstructure. The analytical model of residual stress is proposed considering the effects of CO. The hybrid McDowell algorithm is used to predict the residual stress with the developed plastic modulus. Finally, the sensitivity analysis is carried out, with the result showing that the effect of CO on residual stress is significant.
2

Borisov, Y., S. Voynarovych, A. Kislitsa, A. Borisova, M. Karpetz, and A. Tunik. "Effect of Microplasma Spray Conditions on Structure, Phase Composition and Texture of Hydroxyapatite Coatings." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0029.

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Abstract Hydroxyapatite (HA) coatings were deposited onto titanium alloy substrate using the microplasma spray (MPS) technique. The fractional-factorial experiment design method was employed to study the relationships between MPS parameters (amperage, plasma gas flow rate, spray distance and powder rate) and characteristics of HA coatings (microstructure, morphology, content of crystalline and amorphous phases, texture). Influence of coating thickness and the deposited coating heat treatment were evaluated also. The results show some peculiarities of HA coating formation in conditions of microplasma spraying process.
3

Rodriguez, Manuel Aurelio, and Paris von Lockette. "PDF Evolution of Texture in the Fabrication of Magneto-Active Elastomers." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3868.

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Magneto-Active elastomers (MAEs) and magneto-rheological elastomers (MREs) are smart materials that consist of hard and soft magnetic particles, respectively, embedded in a flexible matrix. Their actuation capabilities are dependent on the arrangement of particles achieved during the fabrication process. Previous works have shown varying degrees of particle alignment and / or agglomeration as a function of fabrication process variable, most notably volume fraction of the particulates, their magnetic material type (hard vs soft), and the strength of the external field applied during curing. In this work, we simulated the dynamics of magnetic particles suspended in a fluid matrix to predict the evolution of microstructures resulting from these varying process conditions. The simulations accounted for the magnetic interaction of all particles using standard dipole-dipole interaction potentials along with dipole-field potentials developed from the Zeeman Energy. Additionally, the field local to each particle, on which magnetization depends, was determined by the sum of the external fields generated by each member of the ensemble and their demagnetizing fields. Fluid drag forces and short range particle-particle repulsion (non-overlapping) were also considered. These interactions determined the body forces and torques acting on each particle that drove the system of equations of motions for the ensemble of particles. The simulation was carried out over a nearest neighbor periodic unit cell using an adaptive time stepping numerical integration scheme until an equilibrium structure was reached. Structural parameters, related to the magnetic energy, spatial distribution, spatial alignment, and orientation alignments of the particle distributions were defined to characterize the simulated structures. The effect of volume fraction and intensity of the external magnetic field on the achieved particle distributions were studied. At low external field strengths, the particles formed long entangled chains that had very low alignment with the applied field. The remnant magnetic potential energy of these configurations was also significantly low. As the field is increased the length of the chains reduced and the alignment increased. The corresponding change in magnetic potential energy of the system with an increase in the applied field was found to follow a power law fit that spanned a wide range of magnetic field strengths. At low volume fractions the particles aligned rapidly with the field and formed short chains. As the volume fraction of the samples increased the chains grew longer and closer to each other, and magnetic potential of the structure became lower. Results of the simulations suggest that it is possible to tailor the microstructure and thus affect remanent magnetization and magnetization anisotropy, by judicious control of process parameters. This ability could have implications for newly emerging additive manufacturing techniques utilizing suspensions of magnetic particulates.
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Yi, Youping, Yan Shi, Jihui Yang, and Yongcheng Lin. "Effects of Forging Process Parameters on Microstructure Evolution of Aluminum Alloy 7050." In 10TH ESAFORM CONFERENCE ON MATERIAL FORMING. AIP, 2007. http://dx.doi.org/10.1063/1.2729559.

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WYNN, MATHEW, and NAVID ZOBEIRY. "A FAST METHOD FOR EVALUATING EFFECTS OF PROCESS PARAMETERS ON MORPHOLOGY OF SEMI-CRYSTALLINE THERMOPLASTIC COMPOSITES." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35919.

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Semi-crystalline thermoplastics such as PEEK have microstructures that are influenced by process parameters like temperature cycle, humidity, and oxygen levels. Inclusions such as carbon fibers lead to heterogenous crystal nucleation. Further, manufacturing uncertainties involved with techniques such as automated fiber placement, compression molding, or induction welding influence the microstructure of thermoplastic composites. These contributing factors impact type (e.g., spherulitic, cross-linked, transcrystalline, and needle-like), size and distribution of morphologies in the material. Even with similar degrees of crystallinities, these differences affect mechanical properties and overall performance of composite parts. In this study, an experimental method has been developed that allows for fast evaluation of morphology as a function of process parameters in semi-crystalline thermoplastic composites. A compression fixture in a Dynamic Mechanical Analyzer (DMA) is used to process thin films of thermoplastics with embedded carbon fibers, sandwiched between thin glass covers, while carefully controlling processing conditions including temperature, pressure, and strain rate. The sample morphology is then analyzed using through transmission Polarizing Light Microscopy (PLM). Samples can be reprocessed using DMA several times to analyze changes in microstructure. This experimental approach allows for fast exploration of timetemperature- transformation relationships and their effects on morphology. This can be used to enhance our understanding of the material microstructure and develop more accurate process simulation tools, leading to optimization of processing parameters.
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Toma, Filofteia-Laura, Stefan Scheitz, Richard Trache, Stefan Langner, Christoph Leyens, Annegret Potthoff, and Kathrin Oelschlägel. "Effect of Feedstock Characteristics and Operating Parameters on the Properties of Cr2O3 Coatings Prepared by Suspension-HVOF Spraying." In ITSC2015, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.itsc2015p0329.

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Abstract Chromium (III)-oxide (Cr2O3) is a widely used coating material for applications in the printing, paper and textile industry, pumps and mechanical sealing systems. Cr2O3 coatings offer high hardness, excellent sliding wear performance and corrosion resistance. Suspension-HVOF process (S-HVOF) allows the production of dense, finely structured coatings with smooth surfaces and improved mechanical properties. The current work presents a study on the development of ready-to-spray aqueous Cr2O3 suspensions starting from different commercial available powders and the effect of suspension characteristics (particle size distribution, viscosity, stability) and operating parameters (gas composition, spray distance) on the microstructure, microhardness and deposition efficiency of the S-HVOF Cr2O3 coatings. By appropriate choice of the suspension and spraying parameters, thick (&gt; 100 μm) and mechanical stable (microhardness higher than 1500 HV0.3) suspension sprayed Cr2O3 coatings were produced.
7

Wang, Zhiyu, Christopher Saldana, and Saurabh Basu. "Subsurface Microstructure and Crystallographic Texture in Surface Severe Plastic Deformation Processes." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2915.

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Severe plastic burnishing was investigated as a promising surface severe plastic deformation technique for generating gradient microstructure surfaces. The deformed state of oxygen free high conductivity copper workpieces during the surface deformation process was determined with high-speed imaging, this complemented by microstructure characterization using orientation image microscopy based on electron backscatter diffraction. Varying deformation levels in terms of both magnitude and gradient on the processed surface were achieved through control of the incident tool angle. Refined microstructures, including laminate grains elongated in the velocity direction and equiaxed sub-micron grains were observed in the subsurface and were found to be controlled by the combined effects of strain and strain rate in the surface deformation process. Additionally, crystallographic texture evolutions were characterized, showing typical shear textures predominately along the <110> partial fiber. The rotation of texture from original ideal orientation positions was related directly to the deformation history produced by sliding process. Based on these observations, a controllable framework for producing the processed surface with expected mechanical and microstructural responses is suggested.
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Alimardani, Masoud, Mehrdad Iravani Tabrizipour, and Amir Khajepour. "Effects of Process Parameters on Surface Finish in Laser Solid Freeform Fabrication." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11612.

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Laser Solid Freeform Fabrication (LSFF) is a flexible rapid prototyping technique in which a laser beam is used to melt and deposit the injected powder in a layer-by-layer fashion to form 3D components. In this paper, the effects of the main process parameters such as laser power and traverse speed on the surface finish of the parts fabricated using the LSFF process are investigated. Since these process parameters and their variations determine the microstructure and other resultant physical qualities of the fabricated parts, they should carefully be selected to increase the surface quality without compromising other quality aspects of the outcomes. For this purpose, along with the experimental analyses, an experimentally verified 3D time-dependent numerical model is employed to comprehensively study the temperature distributions, thermal stress fields, and their variations resulted from different process parameters and consequently different surface finishes. The experimental investigations are conducted through the fabrications of several thin walls of AISI 303L stainless steel using a fiber laser with a maximum power of 1100 W. The numerical and experimental results show under a constant power feed rate by increasing the process speed while optimizing the laser power, the surface finish of the fabricated parts can improve without compromising the melt pool conditions.
9

Shu, Xuedao, Jitai Wang, Sutao Han, and Yilun Wei. "Effect of Process Parameters on the Microstructure of Closed-Open Cross Wedge Rolling." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69787.

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Abstract Microstructure is one of the key factors determining the mechanical properties of an axle, which requires to obtain fine and uniform grain structure. This research work aims to explore the influence of different process parameters on the average grain size and distribution uniformity of the rolled piece during the closed-open cross wedge rolling (CWR) process, so as to improve the micro quality of the rolled piece by adjusting the process parameters. Firstly, an automobile oil pump axle made of 42Crmo is considered as a research object, and a 3D thermal-mechanical-microstructure coupled finite element model of closed-open CWR is established by adopting software DEFORM. Secondly, three points are uniformly selected along the central axis of the rolled piece as observation points, and the variation law of the average grain size at different positions with time is studied. Thirdly, the effects of the reduction of area, the diameter of the rolled piece, the forming angle of the wedge section and the stretching section on the average grain size of the rolled piece and the uniformity of the grain distribution are studied separately. Finally, combined with the closed-open CWR experiment, the influence of different billet diameter on the average grain size is consistent with the simulation results, which verifies the reliability of the model.
10

Ambrosio, E., S. Biamino, F. Calignano, P. Fino, M. Lorusso, D. Manfredi, G. Marchese, M. Pavese, and D. Ugues. "Inconel 625 by Direct Metal Laser Sintering: Effects of the Process Parameters and Heat Treatments on Microstructure and Hardness." In Superalloys 2016. The Minerals, Metals & Materials Society, 2016. http://dx.doi.org/10.7449/superalloys/2016/superalloys_2016_1013_1020.

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