利用热模拟试验机,在温度为1020～1080℃和应变速率为0.001～70 s-1范围内对TC11合金进行真应变为1.2的大应变等温恒应变速率压缩试验,获悉高温塑性流动的应力-应变关系曲线特征,并对变形前后的微观组织进行观察.结果表明:流动应力随应变速率升高和温度降低而增加,但前者比后者对流动应力的影响更为显著;在所研究的温度范围内,当应变速率大于10.0 s-1时,变形组织主要为拉长的β晶粒;当应变速率在1.0～0.01 s-1之间时,变形试样分别发生部分动态再结晶和完全动态再结晶;当应变速率为0.001 s-1时,变形试样以动态回复为主.为获得良好的变形组织,热加工区域以温度在1020～1050℃,应变速率在0.01～1.0 s-1范围为宜.
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