Bridging molecular dynamics and phase-field methods for grain growth prediction

2018 ◽  
Vol 152 ◽  
pp. 118-124 ◽  
Author(s):  
Eisuke Miyoshi ◽  
Tomohiro Takaki ◽  
Yasushi Shibuta ◽  
Munekazu Ohno
Keyword(s):  
Molecular Dynamics ◽  
Grain Growth ◽  
Phase Field ◽  
Field Methods ◽  
Growth Prediction ◽  
Phase Field Methods

Simulation of the Effect of Second Phase Particles in Different Shapes on Grain Growth of Mg Alloy by Phase Field Methods

2017 ◽  
Vol 727 ◽  
pp. 159-165
Author(s):  
Yan Wu ◽  
Si Xia
Keyword(s):  
Grain Growth ◽  
Phase Field ◽  
Volume Fraction ◽  
Mg Alloy ◽  
Spherical Particles ◽  
Second Phase ◽  
Field Methods ◽  
Second Phase Particles ◽  
Different Shapes ◽  
Phase Field Methods

The effect of second phase particles in different shapes on grain growth of AZ31 Mg alloy has been simulated by the phase field methods under realistic spatial-temporal scales. The long-range orientation field variables are chosen to express the temporal microstructure evolution and crystal orientation. The expression of the local free energy density equation was modified by adding the expression term of second phase particles, and the simulated results show that the grain boundary migration is pinned by the second phase particles during the grain growth, which is agree with the Zener pinning observation. When the shape of particles is different and the volume fraction is 10%, the effect of refining grain is different too, the oval particles are the strongest, followed by the rod particles, and the effect of spherical particles are weaker. The research will help to understand the mechanisms of grain growth containing the second phase particles strengthening.

scholarly journals A redefined energy functional to prevent mass loss in phase-field methods

AIP Advances ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 065124
Author(s):  
M. Kwakkel ◽  
M. Fernandino ◽  
C. A. Dorao
Keyword(s):  
Mass Loss ◽  
Phase Field ◽  
Energy Functional ◽  
Field Methods ◽  
Phase Field Methods

Modelling of Grain Boundary Stability of Materials under Severe Plastic Deformation and Experimental Verification

2010 ◽  
Vol 638-642 ◽  
pp. 2724-2729
Author(s):  
Yoshiyuki Saito ◽  
Chitoshi Masuda
Keyword(s):  
Monte Carlo ◽  
Grain Boundary ◽  
Computer Simulations ◽  
Phase Field ◽  
Field Methods ◽  
Simulation Results ◽  
Boundary Stability ◽  
Textured Materials ◽  
Phase Field Methods ◽  
Good Agreement

Thermodynamic stability of Grain boundary in materials under severe plastic deformation was simulated by the Monte Carlo and the phase field methods. Computer simulations were performed on 3-dimensional textured materials. The Monte Carlo simulation results were qualitatively in good agreement with those by the phase field model. The classification of the solution of differential equations based on the mean-field Hillert model describing temporal evolution of the scaled grain size distribution function was in good agreement with those given by the Computer simulations. The ARB experiments were performed for pure Al and Al alloys-sheets in order to validate the computer simulation results concerning the grain boundary stability of textured materials. With use of the Monte Carlo and the phase field methods. Effect of grain boundary mobilises and interface energy given by the computer simulations.

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