Abstract
In order to study the hot deformation behavior of extruded ZK61M magnesium alloy, the hot compression experiment was under the condition that the temperature was 300~450 ℃ and the strain rate was 0.001~0.5 s-1 was carried on by Gleeble-3800 thermal simulator, and the effect of deformation temperature and strain rate on flow stress were analysed. The results show that flow stress of the alloy is negatively correlated with the deformation temperature and positively correlated with the strain rate. Applied by Arrhenius model, the deformation activation energy of extruded ZK61M magnesium alloy is Q=122.69 KJ·mol-1,and stress exponent is n=4.14, so constitutive equation of hot deformation magnesium alloy provides theoretical guidance for the thermal processing parameters and preparation of Mg-Zn-Zr wrought magnesium alloys.
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