6061铝合金高温拉伸流变行为  

The tensile flow behavior of 6061 aluminum alloy during high-temperature

作　　者：赵俊[1] 湛利华[1] 史博[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《塑性工程学报》2014年第3期111-115,共5页Journal of Plasticity Engineering

基　　金：湖南省自然科学基金资助项目(13JJ2009)

摘　　要：利用Gleeble3500热模拟试验机对6061铝合金进行高温拉伸实验,研究变形温度为365℃～565℃和应变速率为0.01s-1～1s-1条件下6061铝合金的高温拉伸流变行为。结果表明,6061铝合金属于正应变速率敏感材料,流变应力随应变速率的增加而增大,随温度的增加而降低;通过线性回归分析计算6061铝合金的应力指数n及变形激活能Q,获得其高温拉伸条件下的流变应力本构方程。The tensile flow behavior of 6061 aluminum alloy was investigated on Gleeble3500 thermal-mechanical simulator over a range of temperature 365℃ -565 ℃ and strain rate 0.01s-1-1s-1 .The results demonstrate that 6061 aluminum alloy is a posi-tive-strain-rate sensitive material . The flow stress increases with the increase of strain rate and decreases with the increase of de-formation temperature . The stress exponent n and the deformation activation energy Q were evaluated by the linear regression a-nalysis . And the tensile flow stress constitutive equation of 6061 aluminum alloy during high-temperature was obtained .

关 键 词：铝合金 高温拉伸实验 流变应力 应变速率 本构方程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]