High Temperature Tension-compression Asymmetry of As-cast AZ31 Alloy
The high temperature tension-compression asymmetry of as-cast AZ31 alloy was studied at 250-500℃ with various strain rates 0.001-1s-1 by Gleeble-1500 dynamic material testing machine.The strain hardening exponents during high temperature tension-compression asymmetry were analyzed by introducing Hollomon equation.The results indicate that during the high temperature tension-compression of as-cast AZ31 alloy,the tension-compression asymmetry is obvious,and the strain hardening exponent of tension is bigger than those of compression.The higher deformation temperature and slower strain rate can decrease the tension-compression asymmetry.