5050铝合金板材高温流变行为研究  

High Temperature Rheological Behavior of Aluminum Alloy Sheet 5050

作　　者：汪洪峰[1] 左敦稳[1] 黄铭敏[1] 陈明和[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《材料工程》2011年第1期23-27,共5页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(50675104);江苏省研究生创新基金(CX09B_073Z)

摘　　要：在303~673K的温度范围内和应变速率为0.001~0.1s-1下对5050铝合金薄板进行高温拉伸试验,研究了5050铝合金高温拉伸性能,以及该合金在升温条件下流变应力与变形温度、应变速率之间的关系。结果表明：5050铝合金的流变应力随温度的升高而降低,随应变速率的升高而升高;高温拉伸试样的伸长率随变形温度的升高而升高,随应变速率的增大而减小。同时使用改进了的Hooke law和Grosman方程建立了5050铝合金在高温拉伸时应力-应变本构模型。The warm tensile tests for 5050 aluminum alloy sheet metal were carried out at elevated temperature and different strain rates.The temperature was 303-673K and the strain rate was 0.001-0.1s-1.The warm tensile properties,relation between temperature,strain rate and the flow stress were studied.The results show that the flow stress declines with the increase of temperature and the decrease of strain rates.Elongation increases with the increase of temperature and the decrease of strain rates.Furthermore,constitutive equations under warm tension are obtained based on Hooke law and Grosman equation.

关 键 词：5050铝合金 高温拉伸 材料应力-应变本构方程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]