Development of Phase-Field Model and Computational Procedure During Static Primary Recrystallization

Abstract

Phase-field model and computational procedure during static primary recrystallization are developed. The developed procedure consists of following three steps. First, the microstructures of plastically deformed polycrystalline metal are simulated by finite element method based on strain gradient crystal plasticity theory. Second, the results such as the accumulated dislocation density and crystal orientation are mapped onto the regular lattices used in phase-field simulation. The stored energy that act as driving force of the grain boundary migration is calculated from the dislocation density and is smoothed to avoid the computational difficulty. Furthermore, the misorientation required for nucleation criteria is calculated on all lattices. Third, phase-field simulation during static primary recrystallization is performed by using mapped data. By conducting a series of numerical simulations, it has been confirmed that the recrystallization microstructure based on the deformation microstructure can be reproduced.