【摘要】 在Gleebe-1500热模拟机上,采用高温等温压缩试验研究了3104铝合金在高温压缩变形中的塑性变形本构关系。结果表明,应变速率和变形温度的变化强烈影响合金流变应力的大小,流变应力随变形温度升高而降低,随应变速率提高而增大;可用含Zener-Hollomon参数的本构方程σ=(1/α)×ln{(Z/A)1/n+[(Z/A)2/n+1]1/2}来描述3104铝合金高温压缩变形时的流变应力行为,解得A=202854595.1s-1、n=3.4046、α=0.03886MPa-1。更多还原

【Abstract】 The constitutive relationship of 3104 aluminum alloy during compression deformation in high temperature is studied by isothermal compression test at Gleeble-1500 thermal-mechanical simulator. The results show that the flow stress is controlled by both strain rate and deforming temperature, the flow stress decreases with the increase of deforming temperature , while icreases with the increase of strain rate. The flow stress of 3104 alloy during high temperature deformation can be represented by a constitutive equation(σ=(1/α)×ln｛(Z/A)~ 1/n +[(Z/A)~ 2/n +1]~ 1/2 ｝) that includes Zener-Hollomon parameter. The calculated results are:A=202854595.1s~ -1 ,n=3.4046,α=0.03886MPa~ -1 .更多还原