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Letteratura scientifica selezionata sul tema "Gradients de microstructure"

Autore: Grafiati

Pubblicato: 9 novembre 2024

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Gradients de microstructure"

1

McNelley, Terry R., Keiichiro Oh-ishi, and Alexandre P. Zhilyaev. "Microstructure Evolution and Microstructure-Property Relationships in Friction Stir Processing of NiAl Bronze." Materials Science Forum 539-543 (March 2007): 3745–50. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3745.

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Friction stir processing (FSP) has been employed for localized modification and control of microstructures in NiAl bronze materials, which are widely utilized for marine components. The thermomechanical cycle of FSP results in homogenization and refinement and the conversion of microstructures from a cast to a wrought condition within stir zones in the material. However, the direct measurement of stir zone temperatures, strains, strain rates and cooling rates is difficult due to steep gradients and transients in these quantities, and this is an impediment in the assessment of FSP-induced micro

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2

Schmidt, Christopher David, Hans-Jürgen Christ, and Axel Von Hehl. "Hydrogen as a Temporary Alloying Element for Establishing Specific Microstructural Gradients in Ti-6Al-4V." Metals 12, no. 8 (2022): 1267. http://dx.doi.org/10.3390/met12081267.

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Parts of vehicles, such as landing gear components of aircrafts, are subject to growing demands in terms of sustainability via lightweight design and durability. To fulfill these requirements, the development of thermochemical processes is auspicious. Titanium alloys allow a heat treatment in hydrogen-containing atmosphere for temporary hydrogen alloying, often called thermohydrogen treatment (THT). The investigation presented intends to realize a local microstructure modification of Ti-6Al-4V by means of THT. The study aims to use hydrogen (H) as a promoter for changing the local distribution

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3

Jalme, Margaux Saint, Christophe Desrayaud, Julien Favre, et al. "Microstructure Evolution during Multiaxial Processing of TA6V." Materials Science Forum 1016 (January 2021): 1211–17. http://dx.doi.org/10.4028/www.scientific.net/msf.1016.1211.

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Subtransus multiaxial hot forging of α+β Ti-6Al-4V (TA6V) titanium alloy with a β-transformed microstructure aims at obtaining an equiaxed microstructure through α phase globularization. The activation of mechanisms involved in microstructural evolution, such as globularization, depends on parameters such as time, temperature, strain and strain rate. It is also sensitive to the crystallographic orientation of α-lamellae. As a result, multiaxial processing of titanium alloys leads to significant microstructural gradients depending on thermomechanical conditions and initial microstructure. In th

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4

Bruder, Enrico, Tilman Bohn, and Clemens Müller. "Properties of UFG HSLA Steel Profiles Produced by Linear Flow Splitting." Materials Science Forum 584-586 (June 2008): 661–66. http://dx.doi.org/10.4028/www.scientific.net/msf.584-586.661.

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Linear flow splitting is a new cold forming process for the production of branched sheet metal structures. It induces severe plastic strain in the processing zone which results in the formation of an UFG microstructure and an increase in hardness and strength in the flanges. Inbuilt deformation gradients in the processing zone lead to steep gradients in the microstructure and mechanical properties. In the present paper the gradients in the UFG microstructure and the mechanical properties of a HSLA steel (ZStE 500) processed by linear flow splitting are presented, as well as a calculation of lo

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5

Büyük, U., S. Engin, and N. Maraşlı. "Directional solidification of Zn-Al-Cu eutectic alloy by the vertical Bridgman method." Journal of Mining and Metallurgy, Section B: Metallurgy 51, no. 1 (2015): 67–72. http://dx.doi.org/10.2298/jmmb140304007b.

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In the present work, the effect of growth rate and temperature gradient on microstructure and mechanical properties of Zn-7wt.%Al-4wt.%Cu eutectic alloy has been investigated. Alloys prepared under steady-state conditions by vacuumed hot filing furnace. Then, the alloys were directionally solidified upward with different growth rates (V=11.62-230.77 mm/s) at a constant temperature gradient (G=7.17 K/mm) and with different temperature gradients (G=7.17-11.04 K/mm) at a constant growth rate (V=11.62 mm/s) by a Bridgman furnace. The microstructures were observed to be lamellae of Zn, Al and broke

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6

Bryndza, Guillian, Jérôme Tchoufang Tchuindjang, Fan Chen, et al. "Review of the Microstructural Impact on Creep Mechanisms and Performance for Laser Powder Bed Fusion Inconel 718." Materials 18, no. 2 (2025): 276. https://doi.org/10.3390/ma18020276.

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Inconel 718 (IN718) is a polycrystalline nickel-based superalloy and one of the most widely used materials in the aerospace industry owing to its excellent mechanical performances at high temperatures, including creep resistance. Interest in additively manufactured components in aerospace is greatly increasing due to their ability to reduce material consumption, to manufacture complex parts, and to produce out-of-equilibrium microstructures, which can be beneficial for mechanical behavior. IN718’s properties are, however, very sensitive to microstructural features, which strongly depend on the

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7

Larivière, Sara, Reinder Vos de Wael, Seok-Jun Hong, et al. "Multiscale Structure–Function Gradients in the Neonatal Connectome." Cerebral Cortex 30, no. 1 (2019): 47–58. http://dx.doi.org/10.1093/cercor/bhz069.

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Abstract The adult functional connectome is well characterized by a macroscale spatial gradient of connectivity traversing from unimodal toward higher-order transmodal cortices that recapitulates known principles of hierarchical organization and myelination patterns. Despite an emerging literature assessing connectome properties in neonates, the presence of connectome gradients and particularly their correspondence to microstructure remains largely unknown. We derived connectome gradients using unsupervised techniques applied to functional connectivity data from 40 term-born neonates. A series

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8

Lomte, Amulya, and Bhisham Sharma. "Modeling the acoustic behavior of stepwise gradient porous structures." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 264, no. 1 (2022): 500–508. http://dx.doi.org/10.3397/nc-2022-764.

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Spatial property gradients can significantly enhance the noise reduction potential of porous structures. However, predicting the acoustic behavior of structures with gradient microstructures continues to remain a challenge. For porous structures with controlled periodic microstructures, researchers have recently demonstrated the use of a multiscale asymptotic method to extract the acoustic transport properties necessary for use in semi-empirical predictive models. Here, we propose the adaptation of this method to enable the modeling of porous absorbers with stepwise property gradients. The uni

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9

Fischer, K., and H. Oettel. "Microstructure Gradients in PVD-TiN Coatings." Materials Science Forum 273-275 (February 1998): 567–72. http://dx.doi.org/10.4028/www.scientific.net/msf.273-275.567.

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10

Georgiadis, H. G. "The Mode III Crack Problem in Microstructured Solids Governed by Dipolar Gradient Elasticity: Static and Dynamic Analysis." Journal of Applied Mechanics 70, no. 4 (2003): 517–30. http://dx.doi.org/10.1115/1.1574061.

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This study aims at determining the elastic stress and displacement fields around a crack in a microstructured body under a remotely applied loading of the antiplane shear (mode III) type. The material microstructure is modeled through the Mindlin-Green-Rivlin dipolar gradient theory (or strain-gradient theory of grade two). A simple but yet rigorous version of this generalized continuum theory is taken here by considering an isotropic linear expression of the elastic strain-energy density in antiplane shearing that involves only two material constants (the shear modulus and the so-called gradi

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Tesi sul tema "Gradients de microstructure"

1

Lin, Ching-Te 1967. "Microstructure, texture, and hardness gradients in aluminum diffusion-bonded to aluminum oxide." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50351.

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2

Baudoin, Pierre. "Caractérisation et identification de propriétés de matériaux métalliques à gradients de microstructure." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10015/document.

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L'objectif de ces travaux de thèse est de proposer une démarche de caractérisation et de simulation de matériaux métalliques à gradients de microstructure. Ces résultats doivent permettre de modéliser l'impact du procédé de forgeage sur la tenue en fatigue à grand nombre de cycles d'essieux ferroviaires, produits dans le cadre du projet Innovaxle par la société Valdunes. Des essais de caractérisation réalisés sur un essieu forgé mettent en évidence un gradient de taille de grain entre le cœur et la surface de la pièce. Ce gradient est reproduit à une échelle plus fine sur des éprouvettes recri

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3

Mohanty, Rashmi. "Phase-Field Simulation of Microstructural Development Induced by Interdiffusion Fluxes Under Multiple Gradients." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4182.

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The diffuse-interface phase-field model is a powerful method to simulate and predict mesoscale microstructure evolution in materials using fundamental properties of thermodynamics and kinetics. The objective of this dissertation is to develop phase-field model for simulation and prediction of interdiffusion behavior and evolution of microstructure in multiphase binary and ternary systems under composition and/or temperature gradients. Simulations were carried out with emphasis on multicomponent diffusional interactions in single-phase system, and microstructure evolution in multiphase systems

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4

Largiller, Grégory. "Maîtrise du frittage de matériaux céramique-métal à gradients de composition et de structure." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0160.

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Les matériaux à gradient de composition et de structure permettent d'associer des propriétés complémentaires dans une pièce donnée. Les cermets (matériaux composite céramique métal) développés par Rio Tinto Alcan seront potentiellement utilisés en tant qu'anodes inertes pour l'électrolyse de l'aluminium. Pour connecter cette pièce à matrice céramique au réseau électrique, ce matériau doit être associé avec un matériau conducteur électrique en une seule opération de frittage. En associant les connaissances issues de la métallurgie des poudres avec une analyse microstructurale, des calculs therm

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5

Beaujoin, Justine. "Post mortem inference of the human brain microstructure using ultra-high field magnetic resonance imaging with strong gradients." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS448/document.

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L’ambition des très hauts champs magnétiques (≥ 7T) à forts gradients (≥ 300mT/m) est de dépasser la résolution millimétrique imposée à plus bas champ pour atteindre l’échelle mésoscopique en neuroimagerie. Etudier le cerveau à cette échelle est essentiel pour comprendre le lien entre fonction et substrat anatomique. Malgré les progrès réalisés sur les aimants cliniques à 7T, il n’en est pas de même des gradients. Cette thèse vise à cartographier le cerveau humain à l’échelle mésoscopique via l’étude de pièces anatomiques post mortem. Une approche alternative a été choisie, reposant sur l'util

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Faham, Mohamed amine. "Influence d’un gradient de microstructure sur la fatigue d’un matériau métallique." Electronic Thesis or Diss., Centrale Lille Institut, 2024. http://www.theses.fr/2024CLIL0008.

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L’étude de la propagation de fissure dans les composants ferroviaires, notamment les essieux, revêt une grande importance. Les aciers ferrito-perlitiques utilisés pour la fabrication de ces composants ferroviaires peuvent avoir une microstructure différente de la surface du composant à cœur, ce qui nous amène à étudier l'influence d'un gradient de microstructure sur la propagation des fissures. Particulièrement, comprendre l'influence d'un gradient de microstructure (taille des constituants, fraction de constituants) sur le régime de fissuration proche du seuil de non propagation, et dans le r

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7

Kuchi, Satish C. "Effect of Finite Geometry on Solidification Microstructure in Beam-Based Fabrication of Thin Wall Structures." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1253252782.

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8

Fradet, Clémence. "Caractérisation d’élastomères synthétiques par indentation instrumentée (I.I.T.) : protocoles et applications." Thesis, Tours, 2019. http://www.theses.fr/2019TOUR4014.

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L’essai d’indentation instrumentée est une technique de caractérisation locale très largement développée qui a mis en lumière son potentiel considérable pour sonder le comportement des matériaux. Elle est néanmoins circonscrite aux métaux, aux céramiques voire aux polymères. De ce fait, elle est peu présente dans la littérature relatant de la mécanique des élastomères, notamment en raison de leur hétérogénéité locale et de leur viscoélasticité, qui sont responsables de biais expérimentaux non négligeables. Cette thèse a donc pour objectif premier de mettre en place un protocole expérimental ro

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9

Pecora, Marina. "Development of a Cyclic Indentation Method for the Characterisation of Material Gradients in Polymers and Polymer Composites Due to Thermal Aging." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2018. http://www.theses.fr/2018ESMA0011/document.

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Le marché des matériaux composites à matrice organique (CMO) pour la réalisation de pièces structurales "froides" (-55°C < T < Tamb) arrive à saturation et l’industrie aéronautique vise à utiliser les CMO tissés 3D dans les pièces structurales dites "chaudes" (50°C < T < 300°C) des avions (nacelles,turbomoteurs). Ces conditions environnementales peuvent entrainer des phénomènes de dégradation à long terme. L'action de l'environnement et la complexité de la microstructure peuvent conduire au développement de gradients de propriétés dans les matériaux. À haute température, la matrice

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10

Tran, Thu Huong. "Comportement homogénéisé des matériaux composites : prise en compte de la taille des éléments microstructuraux et des gradients de la déformation." Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-01038058.

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L'objectif principal du travail réalisé au cours de la thèse consistera à proposer une démarche théorique rigoureuse visant à intégrer les éléments microstructuraux et les gradients de déformation dans une approche micromécanique. La thèse comportera deux volets : - Dans une première partie, on s'attachera à établir un cadre théorique rigoureux permettant d'intégrer les effets du gradient de la déformation et les longueurs caractéristiques de la microstructure sur le comportement effectif des matériaux composites - L'approche par développement asymptotique conduit à la résolution d'une success

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Libri sul tema "Gradients de microstructure"

1

Zhou, Liucheng, and Weifeng He. Gradient Microstructure in Laser Shock Peened Materials. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1747-8.

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2

P, Gangloff R., Kelly R. G, and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program, LA²ST.: Research on materials for the high speed civil transport. National Aeronautics and Space Administration, 1997.

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3

P, Gangloff R., Kelly Robert G, and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program, LA²ST.: Research on materials for the high speed civil transport. National Aeronautics and Space Administration, 1997.

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4

P, Gangloff R., Kelly Robert G, and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program, LA²ST.: Research on materials for the high speed civil transport. National Aeronautics and Space Administration, 1997.

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5

P, Gangloff R., and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program (LA²ST): A progress report July 1, 1994 to December 31, 1994. School of Engineering & Applied Center, 1995.

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P, Gangloff R., and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program (LA²ST): A progress report July 1, 1994 to December 31, 1994. School of Engineering & Applied Center, 1995.

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P, Gangloff R., and United States. National Aeronautics and Space Administration., eds. NASA-UVa light aerospace alloy and structures technology program (LA²ST): A progress report July 1, 1994 to December 31, 1994. School of Engineering & Applied Center, 1995.

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8

Rhaipu, Soranat. The effect of microstructural gradients on the superplastic forming of TI-6AL-4V. University of Birmingham, 2000.

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Patrick, Dunn, and United States. National Aeronautics and Space Administration., eds. An evaluation of a coupled microstructural approach for the analysis of functionally graded composites via the finite-element method. National Aeronautics and Space Administration, 1995.

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10

J, Roth Don, and Lewis Research Center, eds. Scaling up the single transducer thickness-independent ultrasonic imaging method for accurate characterization of microstructural gradients in monolithic and composite tubular structures. National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Capitoli di libri sul tema "Gradients de microstructure"

1

Graja, Paul, and Norbert Meyendorf. "Characterization of Materials Microstructure and Surface Gradients using Advanced Techniques." In Handbook of Nondestructive Evaluation 4.0. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-73206-6_28.

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Graja, Paul, and Norbert Meyendorf. "Characterization of Materials Microstructure and Surface Gradients using Advanced Techniques." In Handbook of Nondestructive Evaluation 4.0. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-48200-8_28-2.

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Graja, Paul, and Norbert Meyendorf. "Characterization of Materials Microstructure and Surface Gradients Using Advanced Techniques." In Handbook of Nondestructive Evaluation 4.0. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-030-48200-8_28-3.

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Graja, Paul, and Norbert Meyendorf. "Characterization of Materials Microstructure and Surface Gradients Using Advanced Techniques." In Handbook of Nondestructive Evaluation 4.0. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-84477-5_28.

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5

Genzel, C. "Problems Related to X-Ray Stress Analysis in Thin Films in the Presence of Gradients and Texture." In Diffraction Analysis of the Microstructure of Materials. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-06723-9_18.

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6

Chen, J. Z., Liang Zhen, Bao You Zhang, Y. X. Cui, and Sheng Long Dai. "Through-Thickness Microstructure, Texture and Strength Gradients in AA 7055 Rolled Plate." In Materials Science Forum. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.957.

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Li, Xiangyu, Baoji Ma, Bin Liu, Jinkui Cao, and Liangliang Li. "Microstructure of AZ31B Alloy Induced by Laser Shock." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-7887-4_63.

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Abstract Magnesium alloys have great potential in the field of biomedical degradable materials. However, their poor mechanical and corrosion resistance properties limit their applications. In this study, the AZ31B alloy with a compact hexagonal close-packed (HCP) crystal structure was selected as the material, as it tends to undergo twinning deformation rather than dislocation slip during plastic deformation due to its low stacking fault energy. The microstructures before and after LSP treatment were characterized using optical microscopy (OM), electron backscatter diffraction (EBSD), and X-ra

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Zhou, Liucheng, and Weifeng He. "Gradient Microstructure Characteristics and the Formation Mechanism in Titanium Alloy Subjected to LSP." In Gradient Microstructure in Laser Shock Peened Materials. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1747-8_3.

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Zhou, Liucheng, and Weifeng He. "Improvement of High Temperature Fatigue Performance in Ni-Based Alloys by LSP-Induced Gradient Microstructures." In Gradient Microstructure in Laser Shock Peened Materials. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1747-8_5.

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Zhou, Liucheng, and Weifeng He. "Study on the Compound Process of LSP and the Strengthening Mechanism on Aero-Engine Blades." In Gradient Microstructure in Laser Shock Peened Materials. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1747-8_7.

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Atti di convegni sul tema "Gradients de microstructure"

1

Dollhofer, Benjamin, Christian Krämer, Niki Nouri1, Stefan Dietrich, and Volker Schulze1. "Characterization of Martensitic-Bainitic Mixed Microstructures Created by Inductive Short Time Austempering of AISI 4140." In IFHTSE 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0041.

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Abstract Induction surface hardening is a process often used in industrial applications to efficiently increase the lifetime of components. Recently, this process has been enhanced with the inductive short time austempering process, creating a martensitic-bainitic microstructure. It is well-known that in homogeneous mixed microstructures, an optimally adjusted volume fraction of bainite can significantly increase the lifetime of the components even further. Regarding inductive short time austempering, there is a lack of knowledge in characterizing and differentiating graded microstructures, wh

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2

Goldstein, Robert C., and D. Scott Mackenzie. "Limitations of Standard Probes for the Measurement of Spray Quenching." In QDE 2025. ASM International, 2025. https://doi.org/10.31399/asm.cp.qde2025p0111.

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Abstract While researchers have attempted to characterize heat transfer coefficients in spray quenching standard immersion probes, the high surface heat transfer creates steep thermal gradients that cause measurement lag and underestimate coefficients. These inaccurate measurements significantly impact predictions of microstructure, dimensions, and residual stress distribution. This study examines thermal gradients across different probe diameters and materials to determine optimal probe geometry for accurate heat transfer coefficient measurement and calculation.

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3

Muggleton, R., P. Linhardt, and G. Zehethofer. "Role of Microstructure in the Susceptibility of X42 ERW Linepipe to CO2 Preferential Weld Corrosion." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10522.

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Abstract Longitudinally welded linepipe can be more susceptible to localized corrosion than seamless linepipe due to chemical composition gradients between the weld and base metal, resulting in galvanic attack. While electric resistance welding (ERW) is an autogenous process that eliminates these chemical gradients, some ERW linepipes still experience preferential weld corrosion (PWC) in CO2 environments. The ERW seam heat treatment causes several chemically similar yet microstructurally different zones to be present in the weld region. Multi-channel zero resistance ammetry performed inside a

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Teixeira, J., K. Jeyabalan, G. Geandier, et al. "In Situ High-Energy XRD Determination and Modeling of Internal Stresses during Heat Treatment of Carburized and Carbonitrided Low-Alloyed Steels." In IFHTSE 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0316.

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Abstract Thermochemical treatments like carburizing and carbonitriding allow to improve the properties in low-alloyed steels, which depend mainly on the distributions of residual stresses and microstructures. As the fatigue properties depend mainly on the latter, a fundamental understanding must be established regarding their formation during the cooling after the enrichment treatment. This study introduces an experimental and simulation analysis of microstructure and internal stresses evolutions and their couplings. Influence of the carbon and nitrogen enrichments is highlighted. An original

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Stoudt, M. R., J. S. Zuback, and M. Yunovich. "Assessing the Performance of Additively Manufactured Alloy 718 after Optimized Heat Treatment for Oil and Gas Applications." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00368.

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Abstract Alloy 718 is attractive for many additive manufacturing (AM) applications, because it exhibits a desirable combination of strength, corrosion resistance, and excellent weldability, but the processing conditions in AM generate considerable residual stresses, compositional gradients, and microstructural heterogeneities that degrade properties and performance. The protocol for solution anneal prescribed in the American Petroleum Institute (API) 6ACRA standard does not sufficiently homogenize the as-printed AM microstructure, thus the required properties cannot be reliably achieved. In wr

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6

Koko, Abdalrhaman, Wesley Bond, Rob Simpson, Maria Lodeiro, Aldo Mendieta, and Gavin Sutton. "Investigating the Microstructural Evolution of Inconel 718 under a Controlled Thermal Gradient." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0449.

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Abstract This study demonstrates the Electro-Thermal Mechanical Testing (ETMT) system's capability to analyze the thermo-mechanical behavior of Inconel 718 (IN718) at a heating rate of 5 °C/s, achieving temperatures up to 950 °C. The temperature profile peaks at the sample's center and is approximately 25 °C at the extremes. Upon reaching 950 °C, the sample was aged for 30 hours before being rapidly quenched. This process froze the microstructure, preserving the phase transformations that occurred at various temperatures across the temperature parabolic gradient, which resulted in a complex gr

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7

Nouri, Niki, Stefan Dietrich, and Volker Schulze. "Transformation Induced Plasticity during Precipitation Strengthening of Maraging Steels." In IFHTSE 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0050.

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Abstract Effective heat treatment is essential for optimizing the properties of steels in various applications. Understanding the evolution of steel microstructure during intrinsic or post-heat treatment, along with managing distortions and residual stresses, is crucial for ensuring component usability. In laser-based additive manufacturing, high temperature gradients and cooling rates induce residual stresses, impacting the heat-affected zones. However, there remains a gap in understanding how stress influences precipitation during heat treatment, particularly regarding transformation-induced

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8

Wang, Anning, Hui Zhang, Feng Qi, Yelong Wang, and Runsheng Liu. "Phase Gradient Metasurface RCS Reduction Technique Based on Metal Mesh Microstructure." In 2024 2nd International Conference on Signal Processing and Intelligent Computing (SPIC). IEEE, 2024. http://dx.doi.org/10.1109/spic62469.2024.10691553.

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9

Samanta, Avik, Ninggang Shen, Haipeng Ji, Weiming Wang, Hongtao Ding, and Jingjing Li. "Simulations of Microstructure Evolution During Friction Stir Blind Riveting Using a Cellular Automaton Method." 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/msec2017-3034.

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Friction stir blind riveting (FSBR) is a novel and highly efficient joining technique for lightweight metal materials, such as aluminum alloys. The FSBR process induced large gradients of plastic deformation near the rivet hole surface and resulted in a distinctive gradient microstructure in this domain. In this study, microstructural analysis is conducted to analyze the final microstructure after the FSBR process. Dynamic recrystallization (DRX) is determined as the dominant microstructure evolution mechanism due to the significant heat generation during the process. To better understand the

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10

KROMER, Robin. "Multiscale Analysis of 316L stainless steel microstructures for WAAM manufacturing tool prediction." In Material Forming. Materials Research Forum LLC, 2024. http://dx.doi.org/10.21741/9781644903131-38.

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Abstract. This study proposes a new approach on a multiscale analysis of 316L stainless steel microstructures to enhance the predictability and homogeneity of microstructure for the Wire Arc Additive Manufacturing (WAAM) process. Despite the promise in the fabrication of large-scale metallic components, achieving consistent microstructure and mechanical properties remains a challenge with WAAM. This research investigates the solidification behaviors, grain morphology, and mechanical characteristics of 316L stainless steel, aiming to develop a predictive framework for WAAM process optimization.

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Rapporti di organizzazioni sul tema "Gradients de microstructure"

1

Castelluccio, Gustavo, Hojun Lim, John Emery, and Corbett Battaile. Fracture Toughness of Microstructural Gradients. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1761823.

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2

McNeil, Anne J. New Microstructures for Old Monomers: Syntheses of Gradient pi-Conjugated Copolymers. Defense Technical Information Center, 2010. http://dx.doi.org/10.21236/ada534918.

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3

Burton R. Patterson. Effect of Casting Conditions and Composition on Microstructural Gradients in Roll Cast Aluminum Alloys. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/927781.

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4

Wootton, K. P., Z. Wu, B. M. Cowan, et al. Observation of 690 MV m^-1 Electron Accelerating Gradient with a Laser-Driven Dielectric Microstructure. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1234198.

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5

Oliynyk, Kateryna, and Matteo Ciantia. Application of a finite deformation multiplicative plasticity model with non-local hardening to the simulation of CPTu tests in a structured soil. University of Dundee, 2021. http://dx.doi.org/10.20933/100001230.

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In this paper an isotropic hardening elastoplastic constitutive model for structured soils is applied to the simulation of a standard CPTu test in a saturated soft structured clay. To allow for the extreme deformations experienced by the soil during the penetration process, the model is formulated in a fully geometric non-linear setting, based on: i) the multiplicative decomposition of the deformation gradient into an elastic and a plastic part; and, ii) on the existence of a free energy function to define the elastic behaviour of the soil. The model is equipped with two bonding-related intern

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