GRAIN GROWTH IN A SYSTEM CONTAINING FINELY DISPERSED MOBILE SECOND-PHASE PARTICLES: A GPU-ACCELERATED MULTI-PHASE-FIELD STUDY

摘要

Three-dimensional multi-phase-field (3D MPF) simulations of polycrystalline grain growth in a system containing mobile second-phase particles were performed. In order to simulate the grain growth influenced by the pinning effect, large-scale 3D MPF simulations were conducted on the TSUBAME2.5 GPU-supercomputer at Tokyo Institute of Technology using the multiple-GPU computing technique developed in our previous study. In this study, we focused on investigating the effect of volume fraction of the particle on the grain growth behavior. Therefore, the grain growth behaviors in the polycrystalline systems including different volume fractions of the particle were simulated. The results showed that the mean grain size was decreased with increasing the volume fraction of the particle. Furthermore, it was observed that the particles in the pinned microstructure were located at the grain boundary corner and the grain boundary edge of the mother phase.