在Gleeble-1500热模拟机上对Ti-6A1-2Zr-1Mo-1V钛合金铸态材料进行了恒温和恒应变速率下的热压缩变形实验，温度范围是700～1000℃，应变速率范围是5×10-3s～450s-1，测试了其真应力-真应变曲线，观察了变形后的组织。结果表明：合金在不同变形条件下其软化机制分别受动态回复和动态再结晶所控制，并且应变速率敏感指数随变形温度的升高而增大。 关键词：Ti-6Al-2Zr-1Mo-1V钛合金；动态再结晶；热压缩；应变速率敏感指数
Hot compressive deformation test of Ti-6M-2Zr-1Mo-1V titanium alloy were studied by Gleeble-1500 Formaster Press Simulator at constant temperatures and constant strain rates. The ranges of temperature and strain rates were 700～1000℃ and 5 ×10-3s-1～50s-1. The compressive true stress vs true strain curves have been measured and the hot deformation microstructures were observed. The results showed that the softening mechanism was dominated by dynamic recrystallization and dynamic recovery at different condition. The sensitivity exponent of strain rate was increased with raising of defomation temperature.
参考文献
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