摘要
基于热模拟压缩试验,研究了变形温度对TC4合金中温塑性变形过程中流动行为和微观组织演变的影响。热模拟压缩试验参数为560～660℃、0.1～50.0 s-1。结果表明,随着变形温度的升高,TC4合金的流动应力逐渐降低;随着应变速率的升高,变形温度对TC4合金流动应力的影响幅度逐渐降低;TC4合金中温塑性变形时的温度敏感性指数随应变和应变速率的增加而降低;随变形温度的升高,TC4合金微观组织均匀程度提高,α晶粒逐渐清晰可辨。
The warm compression test of TC4 alloy was carried out at the deformation temperatures ranging from 560 ℃ to 660 ℃ and strain rates ranging from 0.1 s-1 to 50.0 s-1 by the thermo-testing machine.The effects of deformation temperature on the deformation behavior and microstructure evolution of TC4 alloy were studied.The results show that the flow stress of TC4 alloy decreases with the increase of deformation temperature.The influence of deformation temperature on the flow stress of the alloy decreases with the increase of strain rate.The temperature sensitivity coefficient changes with strain and strain rate.The uniformity of microstructure in the alloy increases with the increase of deformation temperature.
出处
《热加工工艺》
CSCD
北大核心
2012年第16期71-73,76,共4页
Hot Working Technology
关键词
TC4合金
变形温度
流动应力
微观组织
TC4 alloy
deformation temperature
flow stress
microstructure
