Phase Field Simulation of Static Recrystallization Considering Deformation Microstructures and Inhomogeneous Distribution of Stored Energy Based on Lattice Deformation Model

Abstract

A numerical model of recrystallization taking the deformation and the inhomogeneous distribution of stored energy into account were proposed in this paper. Here the deformed microstructure is obtained by a lattice deformation model and the microstructure evolution during recrystallization is simulated by a multi-state free energy phase field method. According to the characteristics of the different deformation zone and the inhomogeneous distribution of the stored energy, the weight factor reflected the distribution of the stored energy in the deformed zones is introduced in this work. As for the density of dislocation, the stored energy in the grain boundary and the triple junctions are double and 2.5 times higher than that within the grain, respectively. We utilize the multi-state free energy function to simulate the recrystallization process of the 0.11C-0.21Si-1.40Mn-0.04Nb steel. The results of simulation match very well with the experiments in the 0.11C-0.21Si-1.40Mn-0.04Nb steel. Therefore, through these models, it provides an excellent resolution to the problem that the deformation and nucleation affection on the process of the recrystallization. It is confirmed that recrystallization simulation depending on the lattice deformation model and taking the inhomogeneous distribution of the store energy into account can be successfully proposed to simulate practical situation.