Cellular Automata Simulation of Dynamic Recrystallization Behavior of AZ81-1Y Magnesium Alloy Based on Laasraoui–Jonas Model

Under the conditions of deformation temperature of 250-400 °C and strain rate of 0.003-1 s⁻¹, hot compression experiments on AZ81-1Y magnesium alloy are carried out by using the Gleeble-1500D testing machine, the dynamic recovery softening coefficient r under different deformation conditions is solved, and the effects of temperature and strain rate on the process parameters are analyzed. Laasraoui–Jonas (L–J) dislocation density modeling is established, along with simulation of alloy evolution during thermal compression using deform-3D software and a comparison of simulation results with experimental microstructure. The results indicate that the dynamic recovery softening coefficient, r, of AZ81-1Y magnesium alloy exhibits a positive correlation with deformation temperature and a negative correlation with deformation rate. The tissue simulation results are consistent with the experimental results. It is shown that the L-J dislocation density model can accurately simulate the microstructure evolution of the alloy during dynamic recrystallization.