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在 Gleeble- 15 0 0热模拟机上对 Ti- 6 Al- 2 Zr- 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试验 .在试验温度 70 0～ 10 0 0℃、应变速率 5× 10 -3～ 5 0 s-1条件下 ,测试了材料的稳态变形抗力 ,并绘制成 lnσ- lnε和 lnσ- 1/ T关系曲线 ,从而确定合金的变形激活能 Q和应力指数 n.观察热变形后的组织表明 :合金在 80 0℃热变形为不完全动态再结晶组织 ,变形机制受动态回复与动态再结晶共同影响 ;90 0℃为完全动态再结晶组织 ,变形机制完全受动态再结晶影响 .合金在 90 0℃以上具有较好的工艺塑性 ,并且应力指数 n随变形温度的升高而减小 .
The hot compressive deformation of Ti-6Al-2Zr-1Mo-1V titanium alloy was carried out on a Gleeble-1500 thermal simulator at a constant temperature and a constant strain rate.At the test temperature of 70 0 ~ 100 ℃ , The steady deformation resistance of the material was tested under the strain rate of 5 × 10 -3 ~ 5 0 s-1, and the curve of lnσ-lnε and lnσ-1 / T was plotted to determine the deformation activation energy Q And stress index n.The thermal deformation of the microstructure showed that the alloy was thermally deformed at 80 ℃ to an incompletely recrystallized microstructure and the deformation mechanism was affected by the dynamic recovery and dynamic recrystallization.The complete recrystallization microstructure was at 90 ℃, The deformation mechanism is completely affected by the dynamic recrystallization.The alloy has better plasticity at 90 0 ℃ and the stress index n decreases with the increase of the deformation temperature.