Hot compression deformation behavior of the Mg-10Gd-3Y-0.6Zr-1Ag magnesium alloy

The Mg-10Gd-3Y-0. 6Zr-1Ag alloy has been performed on Gleeble2000 thermal simulator at the temperature from 350 ℃ to 500 ℃ with the strain rate from 0. 001 s-1to 1 s-1,and the compressive deformation behavior in different deformation conditions has been studied. The results show that the flow stress is significantly affected by deformation temperature and strain rate,and the flow stress decreases with the deformation temperature increasing and strain rate decreasing. The flow stress tends to be constant after a peak value at higher deformation temperature with the constant strain rate. The deformation activation energy and stress exponent were evaluated by the hyperbolic-sine mathematics model and the hot deformation constitutive relationship was established.