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

Yuichi Kimura; Sho Kujirai; Ryo Ueta; Kazuyuki Shizawa

doi:10.4028/www.scientific.net/KEM.725.243

Paper Titles

Subsequent Yield Behavior of Hexagonal Metal with Rolling Texture
p.220

On the Role of Grains in Plastic Deformation and Low Cycle Fatigue of Polycrystalline Metal
p.226

High Temperature Deformation of Cast ZW11 Magnesium Alloy with Very Large Grain Size
p.232

MD Analysis of Effect of Relative Humidity on Molecular Chain’s Network Structure of PEM
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Multiscale Simulation of Dynamic Recrystallization for α-Mg Phase in Mg/LPSO Alloys Based on Multi-Phase-Field and Dislocation-Based Crystal Plasticity Model
p.243

Macroscopic Yield Function Predicted by Crystal Plasticity Simulation on Ultrafine-Grained Aluminum
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Numerical Biaxial Tensile Test of Aluminum Alloy Sheets Using Crystal Plasticity Model Implemented in Commercial FEM Software
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Development of Simulation Technology for Production of Porous Polymeric Membranes
p.261

Crystal Plasticity Analysis of Mechanical Response in Two Phase Alloys with Dispersion of Fine Particles
p.267

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

Abstract:

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.