Mg_(97)Y_2Zn_1合金高温热压缩流动行为  

Flow Stress Behavior of Mg_(97)Y_2Zn_1 Alloy during Hot Compression Deformation at Elevated Temperatures

作　　者：陈彬[1] 卢晨[1] 林栋樑[1] 曾小勤[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240

出　　处：《上海交通大学学报》2010年第5期593-597,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50471015)

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.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.

关 键 词：Mg97Y2Zn1合金 热压缩变形 流变应力 ZENER-HOLLOMON参数 变形激活能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]