【摘要】 在Gleeble-3500型热/力模拟试验机上对5052+Er合金进行了高温压缩热变形,研究了变形温度和应变速率对5052+Er合金高温压缩行为的影响。结果表明:当应变速率为0.01 s^-1时,真应力-真应变曲线表现出典型的动态再结晶特征;当应变速率为0.1 s^-1和1 s^-1时,曲线表现出动态回复特征;继续增加应变速率至10 s^-1时,流变应力达到峰值后出现后锯齿状波动,此时的合金已经发生了动态再结晶;随着变形温度的升高和应变速率的减小,5052+Er合金的流变应力会逐渐减小;5052+Er合金热压缩变形的流变应力方程为:■不同热变形条件下峰值应力的计算值与测量值的误差在10%以内。更多还原

【Abstract】 The thermal deformation of 5052+Er alloy at high temperature was carried out with the Gleeble-3500 type thermal/force simulation test machine and the effects of deformation temperature and strain rate on the high temperature compression behavior of 5052+Er alloy were studied. The results show that when the strain rate is 0.01 s^-1, the true stress-true strain curve presents typical dynamic recrystallization features; When the strain rates are 0.1 s^-1 and 1 s^-1, the curves are characterized with dynamic recovery; When the strain rate increases to 10 s^-1, after the flow stress reaches the peak value, the zigzag wave appears, and the dynamic recrystallization of the alloy occurrs; With the increasing of the deformation temperature and the decreasing of the strain rate, the rheological stress of the 5052+Er alloy decreases gradually, and the rheological stress equation of the thermal compression deformation of 5052+Er alloy is ■, and the errors between the calculated values of the peak stress and the measured values under different thermal deformation conditions are lower than 10%.更多还原