Simulations of grain particle rearrangement in semi-solid metals by multi-phase-field lattice Boltzmann model
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During the casting process, the rearrangement behavior of grain particles plays a critical role in the formation of defects [1]. In particular, externally applied shear force locally reduce the solid fraction, leading to the formation of segregation bands [2]. However, the underlying mechanism of defect formation associated with grain particle rearrangement remain insufficiently understood. In this study, three-dimensional semi-solid shear deformation simulations were performed using multi-phase-field lattice Boltzmann model. This framework integrates the multi-phase-field method for grain particles and the lattice Boltzmann method for the fluid flow. The simulations revealed the deformation behavior of semi-solid materials with a focus on the dynamics of grain particle rearrangement.