Phase Field Simulation for Abnormal Growth of Grains by the In-Homogeneous Grain Boundary Energy

摘要

The phase field models have been built to study the influence of the nonuniform grain boundary energy for abnormal growth of grains in the AZ31 magnesium alloy in the real time and space. The simulated results show that if the grains of a certain orientation with low grain boundary energy in the AZ31 Mg alloy, abnormal grain growth will occur after annealing treatment, and only if the local low grain boundary energy is less than 0.98σ_(0)_(, )can the certain grains grow abnormally in the microstructure.