215202 Multi-physics Model of Dynamic Recrystallization Based on Multi-phase-field Theory and Dislocation-crystal Plasticity Theory and Its Simulation

2011 ◽  
Vol 2011.17 (0) ◽  
pp. 353-354
Author(s):  
Akira NAGATSU ◽  
Shinichi SATO ◽  
Mayu MURAMATSU ◽  
Yoshiteru AOYAGI ◽  
Kazuyuki SHIZAWA
Keyword(s):  
Field Theory ◽  
Dynamic Recrystallization ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Plasticity Theory ◽  
Crystal Plasticity Theory ◽  
Physics Model ◽  
Multi Phase

scholarly journals Review of γ’ Rafting Behavior in Nickel-Based Superalloys: Crystal Plasticity and Phase-Field Simulation

Crystals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1095
Author(s):  
Zhiyuan Yu ◽  
Xinmei Wang ◽  
Fuqian Yang ◽  
Zhufeng Yue ◽  
James C. M. Li
Keyword(s):  
Single Crystal ◽  
Crystal Plasticity ◽  
Microstructure Evolution ◽  
Phase Field ◽  
Field Method ◽  
Plasticity Theory ◽  
Phase Field Method ◽  
Field Simulation ◽  
Crystal Plasticity Theory ◽  
Excellent Tool

Rafting is an important phenomenon of the microstructure evolution in nickel-based single crystal superalloys at elevated temperature. Understanding the rafting mechanism and its effect on the microstructure evolution is of great importance in determining the structural stability and applications of the single crystal superalloys. Phase-field method, which is an excellent tool to analyze the microstructure evolution at mesoscale, has been gradually used to investigate the rafting behavior. In this work, we review the crystal plasticity theory and phase-field method and discuss the application of the crystal plasticity theory and phase-field method in the analysis of the creep deformation and microstructure evolution of the single crystal superalloys.

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.

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