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Article Dans Une Revue Journal of the Mechanics and Physics of Solids Année : 2018

A Cosserat crystal plasticity and phase field theory for grain boundary migration

Anna Ask
  • Fonction : Auteur
Samuel Forest
Kais Ammar

Résumé

The microstructure evolution due to thermomechanical treatment of metals can largely be described by viscoplastic deformation, nucleation and grain growth. These processes take place over different length and time scales which present significant challenges when formulating simulation models. In particular, no overall unified field framework exists to model concurrent viscoplastic deformation and recrystal-lization and grain growth in metal polycrystals. In this work a thermodynamically consistent diffuse interface framework incorporating crystal viscoplasticity and grain boundary migration is elaborated. The Kobayashi–Warren–Carter (KWC) phase field model is extended to incorporate the full mechanical coupling with material and lattice rotations and evolution of dislocation densities. The Cosserat crystal plasticity theory is shown to be the appropriate framework to formulate the coupling between phase field and mechanics with proper distinction between bulk and grain boundary behaviour.
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Dates et versions

hal-01615967 , version 1 (12-10-2017)
hal-01615967 , version 2 (30-10-2018)

Identifiants

Citer

Anna Ask, Samuel Forest, Benoit Appolaire, Kais Ammar, Oguz Umut Salman. A Cosserat crystal plasticity and phase field theory for grain boundary migration. Journal of the Mechanics and Physics of Solids, 2018, 115, pp.167-194. ⟨10.1016/j.jmps.2018.03.006⟩. ⟨hal-01615967v1⟩

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