论文部分内容阅读
通过热模拟压缩试验,测试了Ti-17合金在温度T=805~945℃,应变速率ε=10(-3)~80s(-1)、变形程度ε=50%范围内的真应力-应变曲线,研究了不同温度、不同应变速率下的流动应力及组织变化规律。发现,在(α+β)两相区降低温度或提高应变速率,流动应力σ变化较大,动态再结晶易于进行;在β区通常只发生动态回复,流动应力σ随温度和应变速率变化较小,高温、低应变时发生连续再结晶。试验还用Zener-Hollomon因子确定了该台金发生连续再结晶的临界因子Zc的数值,logZC=41.2。
Through the thermal simulation compression test, the true stress-strain of Ti-17 alloy at T = 805-945 ℃, strain rate ε = 10 (-3) ~ 80s (-1) and deformation degree ε = 50% Curves, the flow stress and microstructure variation under different temperatures and different strain rates were studied. It is found that the dynamic recrystallization is easy to proceed when the temperature is decreased or the strain rate is increased in the (α + β) two-phase region, and the dynamic recrystallization is easy to proceed. In the β region, only the dynamic recovery usually occurs. The flow stress σ changes little with the temperature and strain rate, Continuous recrystallization occurs at high temperature and low strain. The Zener-Hollomon factor was also used to determine the value of Zc, a critical factor for the continuous recrystallization of gold, with logZC = 41.2.