TC11合金β相区大应变热变形行为及组织研究Investigation on hot deformation behavior and microstructure of TC11 alloy at large strain during β-phase
李鑫;赵为纲;鲁世强;王克鲁;
摘要(Abstract)：
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。
关键词(KeyWords)： TC11合金;热态压缩;流动应力;微观组织;变形机制
基金项目(Foundation):
作者(Author): 李鑫;赵为纲;鲁世强;王克鲁;
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