上海交通大学学报

上海交通大学学报（自然版）

• 金属学与金属工艺 •    下一篇

Mg97Y2Zn1合金高温热压缩流动行为

陈彬，卢晨，林栋樑，曾小勤   

  1. (上海交通大学 材料科学与工程学院， 上海 200240)
  • 收稿日期:2009-11-09 修回日期:1900-01-01 出版日期:2010-05-31 发布日期:2010-05-31

Flow Stress Behavior of Mg97Y2Zn1 Alloy during Hot Compression Deformation at Elevated Temperatures

CHEN Bin，LU Chen，LIN Dongliang，ZENG Xiaoqin   

  1. (School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-11-09 Revised:1900-01-01 Online:2010-05-31 Published:2010-05-31

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.

关键词: Mg97Y2Zn1合金, 热压缩变形, 流变应力, ZenerHollomon参数, 变形激活能

Abstract: 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.

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