Abstract:
The kinetics of dynamic recrystallization of ZK60 magnesium alloy was investigated by compression tests at temperature of 200−400 ℃ and strain rate of 0.001−10 s−1. The flow stress curves considering only dynamic recovery was described by EM model. Based on EM model, the kinetics of dynamic recrystallization of ZK60 alloy was modeled by an Avrami-type equation. The finite element simulations were utilized to simulate the recrystallization process of ZK60 alloy during hot compression. The results show that, due to the effect of dynamic recovery, the flow stress increases to a peak value and subsequently decreases to steady state. Both the volume fraction of dynamic recrystallization and the deformation homogeneity increase with the increase of the plastic strain and deformation temperature, while decrease with the increase of strain rate.
