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摘要：
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在Gleeble2000热模拟机上对铸态AZ80镁合金在应变速率为0.001~1 s-1、变形温度为240~440℃条件下的热压缩变形行为进行了研究。结果表明:AZ80镁合金热压缩变形的流变应力受到变形温度和应变速率的显著影响,可以用Zener-Hollomon参数的双曲正弦函数形式进行描述。本实验条件下,AZ80镁合金热压缩变形时的应力指数n为5,其热变形激活能Q为183 kJ.mol-1,建立了流变应力的数学模型,其结果可为变形镁合金的塑性成形工艺的制订提供更为科学的依据。
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Hot compression tests of AZ80 magnesium alloy were performed on Gleeble2000 ranging from 0.001 to 1s-1 and deformation temperature ranging from 240 to 440℃.The results show that the flow stress behaviors strongly depend on the deformation temperature and strain rate,which can be demonstrated by a Zener-hollomon parameter in the hyperbolic-sine-type equation during hot compression deformation.In the present study,the hot deformation activation energy is 183kJ·mol-1 and the stress exponent is 5 during the hot compression deformation of AZ80 magnesium alloy.And the flow stress mathematics model has been established,its result might provide a more scientific basis for plastic forming of wrought magnesium alloy.
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基金项目：
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高等学校科技创新工程重大项目培育资金项目(704015);;
高等学校科技创新引智计划(B07015)
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作者简介：
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参考文献：
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