作　　者： ; ; ; ; ;

机构地区： 中南大学材料科学与工程学院

出　　处： 《热加工工艺》 2007年第21期1-4,共4页

摘　　要： 采用Gleeble-1500热模拟机对圆柱试样进行恒温和恒速压缩变形实验,研究了01570铝合金在变形温度为360～480℃、应变速率为0.001～1 s-1条件下的流变变形行为。结果表明:应变速率和变形温度对合金流变应力的大小有显著影响,流变应力随温度升高而降低,随应变速率的提高而增大,达到峰值后趋于平稳,表现出动态回复的特征。可用包含Arrhenius项的Zener-Hollomon参数描述01570铝合金高温塑性变形时的流变行为。 The flow stress features of 01570 aluminum alloy were studied by constant temperature and rate compression at 360 -480℃ and strain rate of 0.001 - 1 s^-1 through Gleeble 1500 simulated machine. The results show that the flow stress is controlled by strain rate and deformation temperature. The flow stress decreases with deformation temperature increasing and increases with strain rate increasing. The flow stress of 01570 aluminum alloy tends to be constant after a peak value , which shows dynamic recovery. The flow stress of 01570 aluminum alloy during high temperature deformation can be represented by Zener-Hollomon parameter including the Arrhenius term.

关 键 词： 铝合金 热压缩变形 热变形激活能 流变应力 参数

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]