OS0412 Investigation of Intragranular Stress Due to Deformation Twinning on HCP Metals Using Dislocation-based Crystal Plasticity Model Coupling with Phase-field Method

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS0412-1_-_OS0412-3_
Author(s):  
Ruho KONDO ◽  
Yuichi TADANO ◽  
Kazuyuki SHIZAWA
Keyword(s):  
Crystal Plasticity ◽  
Phase Field ◽  
Field Method ◽  
Deformation Twinning ◽  
Phase Field Method ◽  
Model Coupling ◽  
Plasticity Model ◽  
Crystal Plasticity Model

Quantitative Evaluation of Deformation Twinning Behavior in Polycrystalline Pure Magnesium

2016 ◽  
Vol 725 ◽  
pp. 214-219
Author(s):  
Takeshi Soeda ◽  
Yuichi Tadano ◽  
Seiya Hagihara
Keyword(s):  
Crystal Plasticity ◽  
Deformation Twinning ◽  
Pure Magnesium ◽  
Dominant Factor ◽  
Plasticity Model ◽  
Element Mesh ◽  
Twin System ◽  
Crystal Plasticity Model ◽  
Strong Inhomogeneity ◽  
Twinning System

A crystal plasticity analysis of polycrystalline pure magnesium is conducted to investigate deformation twinning behavior at the crystal grain scale. A dominant factor in the onset of deformation twinning is the resolved shear stress on a twinning system. More than one twin system may simultaneously be activated in a crystal grain, resulting from inhomogeneous stress distribution caused by constraints imposed by neighboring grains. In this study, a pure magnesium polycrystal is modeled using a fine finite element mesh and analyzed using the crystal plasticity model involving deformation twinning. The evolution of deformation twinning at the crystalline scale is numerically investigated, and the present approach demonstrates that two or more twinning systems are be activated in a single crystal grain because of the strong inhomogeneity in the grain.

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