中文摘要：

通过Gleeble-3500型热模拟机研究了Mg97Y2Zn1镁合金在热变形过程中流变应力与变形温度和应变速率等之间的关系,并建立了相应的流变应力模型.结果表明：在所采用的试验条件下,Mg97Y2Zn1合金的流变应力随变形温度的升高而降低,随应变速率的增加而提高;Mg97Y2Zn1合金的流动应力应变行为可用Zener-Hollomon参数表示;Mg97Y2Zn1合金在高温塑性变形过程中的平均变形激活能为137.277 kJ/mol.

英文摘要：

The relationship among the flow stress,the deformation temperatures and the strain rates of Mg97Y2Zn1 magnesium alloy during hot compression deformation was investigated by using Gleeble-3500 thermal-mechanical simulator.And the corresponding flow stress model was established.The results indicate that the flow stress of the alloy decreases with increasing temperature at a given strain rate,and increases with increasing strain rate at a given temperature.The flow stress behavior of Mg97Y2Zn1 magnesium alloy during high temperature deformation can be represented by a Zener-Hollomon parameter.The hot deformation activation energy of the alloy is 137.277 kJ/mol.