Academic Journal
Cosserat-phase-field modeling of grain nucleation in plastically deformed single crystals
| العنوان: | Cosserat-phase-field modeling of grain nucleation in plastically deformed single crystals |
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| المؤلفون: | Ghiglione, Flavien, Ask, Anna, Ammar, Kais, Appolaire, Benoît, Forest, Samuel |
| المساهمون: | Centre des Matériaux (CDM), Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), DMAS, ONERA, Université Paris Saclay Châtillon, ONERA-Université Paris-Saclay, Institut Jean Lamour (IJL), Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), CNRS 80prime |
| المصدر: | ISSN: 0022-5096 ; Journal of the Mechanics and Physics of Solids ; https://hal.science/hal-04522706 ; Journal of the Mechanics and Physics of Solids, 2024, 187, pp.105628. ⟨10.1016/j.jmps.2024.105628⟩. |
| بيانات النشر: | CCSD Elsevier |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Crystal Plasticity, Cosserat Continuum, Phase field approach, Nucleation, Recrystallization, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] |
| الوصف: | International audience ; Thermomechanical processing of crystalline materials induces microstructural evolution such as grain nucleation and growth. In the numerical simulation of these processes, grain nucleation is generally treated as an additional ad hoc step in which circular or spherical grains are added in regions where a critical dislocation density, stress or strain are reached. In this paper, systematic finite element simulations are performed showing that the Kobayashi-Warren-Carter (KWC) phase field model and its coupling with Cosserat crystal plasticity predict spontaneous nucleation of new grains in single crystals in the presence of lattice orientation/rotation gradients. The numerical analysis of the stability of gradients of lattice rotation and dislocation-based stored energy indicates that a gradient of stored energy alone is not sufficient to trigger grain formation. As an application, the KWC-Cosserat model is used to simulate the torsion and annealing of a copper single crystal bar with a circular cross section. This mechanical loading produces a large, fairly uniform axial rotation gradient which induces nucleation in the form of a stack of cylindrical grains. Plastic strain gradients in cross-sections predicted by the 3D finite element simulation, are not strong enough to compete with the longitudinal nucleation process, as confirmed by experimental observations from the literature. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1016/j.jmps.2024.105628 |
| الاتاحة: | https://hal.science/hal-04522706 https://hal.science/hal-04522706v1/document https://hal.science/hal-04522706v1/file/GhiglioneNucleation24final.pdf https://doi.org/10.1016/j.jmps.2024.105628 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.FC0355A7 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.jmps.2024.105628 |
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