Cellular Automaton‐Based Modeling of Recrystallization Texture Considering Instability Criterion and Nonuniform Boundary Mobility in AA1100 Aluminum Alloy

Abstract

Herein, the nucleation instability criteria and nonuniform mobility are considered in the 2D cellular automaton simulation to investigate the recrystallization texture of cold‐rolled AA1100. Under the consideration of mechanical instability, the critical driving force for nucleation depends on the differences of the stored energy between a center cell and the neighboring cells. The possible nucleation sites are reduced to 37.5% in comparison with the nucleation model using a constant value of the driving force. The simulation of nucleation reveals that the mechanical instability promotes the formation of recrystallization textures at the expense of neighboring grains with orientations of deformation textures. The nonuniform mobility of high‐angle grain boundaries is implemented in simulation of recrystallization. The enhanced mobility of high‐angle grain boundaries with misorientation of 40°/<111> significantly promotes the growth of grains with orientations of Cube and RC20°RD (recrystallization textures) and inhibits the growth of grain with orientations of C, S, and B (deformation textures).