Deformation Behavior and Constitutive Equation of AZ31 Magnesium Alloy at Elevated Temperature

Using Gleeble-3500 thermo-mechanical simulator,hot compression test for AZ3l magnesium alloy at deformation temperatures of 523～723 K and strain rates of 0.01～10.00 s-1 were carried out under maximum strain of 60%.The experimental results show that flow stress increases apparently with strain.Above a critical peak value,flow stress decreases gradually to be a steady state.The characteristic with the dynamic recrystallization occurs during hot compression of AZ3l magnesium alloy.The effects of deformation temperature and strain rate on flow stress are dominating.In this paper,a constitutive equation with Arrheniues item is established to describe the deformation behavior of AZ3l magnesium alloy at elevated temperature.