P015 Crystal Plasticity Multi-phase-field Model for Predicting Nucleation by Grain Boundary Bulging

2015 ◽  
Vol 2015.90 (0) ◽  
pp. 433
Author(s):  
Takato YAMAGUCHI ◽  
Tomohiro TAKAKI
Keyword(s):  
Grain Boundary ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Multi Phase

Dual Scale Simulation of Grain Growth Using a Multi Phase Field Model

2001 ◽  
Vol 677 ◽  
Author(s):  
Ingo Steinbach ◽  
Markus Apel
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Individual Characteristics ◽  
Interfacial Stress ◽  
Pinning Force ◽  
Pinning Effect ◽  
Multi Phase

ABSTRACTThe kinetics of grain growth in multicrystalline materials is determined by the interplay of curvature driven grain boundary motion and interfacial stress balance at the vertices of the grain boundaries. A comprehensive way to treat both effects in one model is given by the time dependent Ginzburg Landau model or phase field model. The paper presents the application of a multi phase field model, recently developed for solidification processes to grain growth of a multicrystalline structure. The specific feature of this multi phase field model is its ability to treat each grain boundary with its individual characteristics dependent on the type of the grain boundary, its orientation or the local pinning at precipitates. The pinning effect is simulated on the nanometer scale resolving the interaction of an individual precipitate with a curved grain boundary. From these simulations an effective pinning force is deduced and a model of driving force dependent grain boundary mobility is formulated accounting for the pinning effect on the mesoscopic scale of the grain growth simulation. 2-D grain growth simulations are presented.

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.

scholarly journals An investigation of the lamellar-rod transition in binary eutectic using multi-phase field model

2009 ◽  
Vol 58 (1) ◽  
pp. 650
Author(s):  
Yang Yu-Juan ◽  
Wang Jin-Cheng ◽  
Zhang Yu-Xiang ◽  
Zhu Yao-Chan ◽  
Yang Gen-Cang
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Binary Eutectic ◽  
Multi Phase
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