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Article Dans Une Revue Advanced Modeling and Simulation in Engineering Sciences Année : 2020

Microstructure evolution in deformed polycrystals predicted by a diffuse interface Cosserat approach

Samuel Forest
Benoit Appolaire
Kais Ammar

Résumé

Formulating appropriate simulation models that capture the microstructure evolution at the mesoscale in metals undergoing thermomechanical treatments is a formidable task. In this work, an approach combining higher-order dislocation density based crystal plasticity with a phase-field model is used to predict microstructure evolution in deformed polycrystals. This approach allows to model the heterogeneous reorientation of the crystal lattice due to viscoplastic deformation and the reorientation due to migrating grain boundaries. The model is used to study the effect of strain localization in subgrain boundary formation and grain boundary migration due to stored dislocation densities. It is demonstrated that both these phenomena are inherently captured by the coupled approach.
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Dates et versions

hal-02494630 , version 1 (28-02-2020)

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Anna Ask, Samuel Forest, Benoit Appolaire, Kais Ammar. Microstructure evolution in deformed polycrystals predicted by a diffuse interface Cosserat approach. Advanced Modeling and Simulation in Engineering Sciences, 2020, 7 (1), ⟨10.1186/s40323-020-00146-5⟩. ⟨hal-02494630⟩
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