5083铝合金热压缩变形流变应力行为  

Flow stress behavior of 5083 aluminium alloy under hot compression deformation

作　　者：吴文祥[1] 孙德勤[1] 曹春艳[1] 王战锋[2] 张辉[2] 

机构地区：[1]苏州有色金属加工研究院,苏州215026 [2]湖南大学材料科学与工程学院,长沙410082

出　　处：《中国有色金属学报》2007年第10期1667-1671,共5页The Chinese Journal of Nonferrous Metals

基　　金：中国铝业公司科技发展基金资助项目(2006KJA08)

摘　　要：在Gleeble-1500热模拟机上,当变形温度为300-500℃、应变速率为0.01-10 s^-1、真应变为0-0.8时,采用圆柱体等温热压缩实验研究5083铝合金变形流变应力行为。通过分析流变应力指数函数中系数A、β与应变的关系,建立Zener-Hollomon参数的指数关系本构方程。运用该本构方程对5083铝合金不同应变速率、变形温度及应变条件下的流变应力进行预测,发现流变应力预测值与温升修正值吻合得相当好。The flow stress behavior of 5083 aluminium alloy under hot compression deformation, in the temperature range of 300-500 ℃, strain rates of 0.01-10 s ^-1 and true strains of 0-0.8, was investigated by cylindrical compression tests on Gleeble 1 500 machine. The constitutive equations were presented considering the values of A and β as function of strain by Zener-Hollomon parameter in the exponential function form. Using the constitutive equations presented, the prediction of the flow stress in 5083 aluminium alloy as function of strain rate, temperature and strain shows to be in good agreement with the measured flow stresses corrected for temperature rise.

关 键 词：5083铝合金 热压缩变形 温升 流变应力 本构方程 

分 类 号：TG166.3[金属学及工艺—热处理]