摘要
利用Gleeb le-1500热力模拟试验机,在温度为650-950℃、应变速率为0.01-5 s-1、总应变量0.7的条件下,对纯Cu高温塑性变形过程中的动态再结晶行为进行了研究和分析。试验结果表明：纯铜高温流动应力-应变曲线主要以动态回复和动态再结晶软化机制为特征,峰值应力随变形温度的降低或应变速率的升高而增加;在真应力-应变曲线基础上,建立的纯铜高温变形本构方程较好地表征了其高温流变特性。
Using a Gleeble-1500 simulator the dynamic recrystallization behavior of pure copper were investigated at 650~950 ℃ with the strain rate of 0.01~5 s-1 and total strain of 0.7.The results show that the softening mechanism of dynamic recovery and dynamic recrystallization is a feature of high-temperature flow stress-strain curves of pure copper,and the peak stress increases with decreasing of the deformation temperature or increasing of the strain rate.Based on the true stress-strain curves,the established constitutive equation represents high temperature flow behavior of pure copper,and the calculated results of the flow stress are in good agreement with the experimental results of high temperature deformation of pure copper.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第8期17-20,共4页
Heat Treatment of Metals
基金
国家自然科学基金(50571035)
关键词
高温变形
动态再结晶
流变应力
本构方程
high temperature deformation
dynamic recrystallization
flow stress
constitutive equation
