On the plastic driving force of grain boundary migration: A fully coupled phase field and crystal plasticity model

2017 ◽  
Vol 128 ◽  
pp. 320-330 ◽  
Author(s):  
L. Zhao ◽  
P. Chakraborty ◽  
M.R. Tonks ◽  
I. Szlufarska
Keyword(s):  
Grain Boundary ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Driving Force ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Plasticity Model ◽  
Crystal Plasticity Model ◽  
Fully Coupled

Multiscale Simulation of Dynamic Recrystallization for α-Mg Phase in Mg/LPSO Alloys Based on Multi-Phase-Field and Dislocation-Based Crystal Plasticity Model

2016 ◽  
Vol 725 ◽  
pp. 243-248
Author(s):  
Yuichi Kimura ◽  
Sho Kujirai ◽  
Ryo Ueta ◽  
Kazuyuki Shizawa
Keyword(s):  
Grain Boundary ◽  
Dynamic Recrystallization ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Boundary Segregation ◽  
Multiscale Simulation ◽  
Plasticity Model ◽  
Lpso Phase ◽  
Crystal Plasticity Model ◽  
Multi Phase

Magnesium alloy with Long-Period Stacking Ordered Structure (LPSO) and α-Mg (ordinary HCP structure) phase is expected for a new structural material due to its excellent mechanical properties. Its materials strengthening arises from the kink band formation in LPSO phase and the grain refinement of α-Mg phase in the vicinity of LPSO phase because of recrystallization. In the present study, a multiscale and multiphysics computation for the dynamic recrystallization in α-Mg phase is carried out by coupling the dislocation-based crystal plasticity model for HCP crystals proposed previously by the authors with the multi-phase field model through dislocation density. In the present model, not only the environmental temperature-dependences of nucleation and nucleus growth but also a pinning effect of boundary migration of recrystallized grain boundary owing to existence and influence of additive elements are newly taken into account. Furthermore, grain size behaviors of recrystallized nuclei are investigated for various volume fractions of additive element and ratios of grain boundary segregation.

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

2018 ◽  
Vol 115 ◽  
pp. 167-194 ◽  
Author(s):  
Anna Ask ◽  
Samuel Forest ◽  
Benoit Appolaire ◽  
Kais Ammar ◽  
Oguz Umut Salman
Keyword(s):  
Field Theory ◽  
Grain Boundary ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Boundary Migration ◽  
Grain Boundary Migration

scholarly journals Cosserat crystal plasticity with dislocation-driven grain boundary migration

2018 ◽  
Vol 03 (03n04) ◽  
pp. 1840009 ◽  
Author(s):  
Anna Ask ◽  
Samuel Forest ◽  
Benoit Appolaire ◽  
Kais Ammar
Keyword(s):  
Grain Boundary ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Field Model ◽  
Boundary Migration ◽  
Phase Field Model ◽  
Grain Boundary Migration ◽  
Modeling Framework ◽  
Lattice Curvature ◽  
Single Crystal Plasticity

This paper discusses a coupled mechanics–phase-field model that can predict microstructure evolution in metallic polycrystals and in particular evolution of lattice orientation due to either deformation or grain boundary migration. The modeling framework relies on the link between lattice curvature and geometrically necessary dislocations and connects a micropolar or Cosserat theory with an orientation phase-field model. Some focus is placed on the underlying theory and in particular the theory of dislocations within a continuum single crystal plasticity setting. The model is finally applied to the triple junction problem for which there is an analytic solution if the grain boundary energies are known. The attention is drawn on the evolution of skew–symmetric stresses inside the grain boundary during migration.

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