在Gleeble-1500D热模拟实验机上,在应变速率为0.01～5/s、变形温度为600～800℃条件下,采用高温等温压缩实验对Cu-2.00Ni-0.5Si-0.03P合金的流变应力行为进行研究.结果表明:热模拟实验中,应变速率和变形温度的变化强烈地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;在应变温度为750和800℃时,合金热压缩变形流变应力出现明显的峰值应力,表现为连续动态再结晶特征.从流变应力、应变速率和温度的相关性,得出该合金热压缩变形时的热变形激活能和本构方程.
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