| Abstract Scope |
In casting processes, the semi-solid deformation causes macrosegregation. To reduce the macrosegregation, it is crucial to elucidate the mechanisms of semi-solid deformation. Thus, modeling and simulation studies are indispensable for a better understanding of the semi-solid deformation. However, the semi-solid deformation is a very complicated multi physics problem including solidification, liquid flow, solid motion, solid-solid interaction, and so on. In our previous study, we constructed the multi-phase-field lattice Boltzmann (MPF-LB) model, which can simulate the growth of multiple dendrites with motion, liquid flow, collision, and coalescence and subsequent grain growth, to express the formation process of equiaxed solidification structures [Comput. Mater. Sci., 147 (2018) 124–131]. In this study, the MPF-LB model is modified to enable the accurate simulation of the semi-solid deformation. Also, shear deformations of granular materials are simulated by systematically changing the solid fraction and grain morphology, and the mechanisms in semi-solid deformation are discussed in detail. |