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在Gleeble-1500热模拟试验机上,当应变速率为0.1～10 s~(-1),变形温度为800～860℃时,采用高温压缩试验对Ti-5553钛合金热压缩变形中流变应力行为进行研究。研究结果表明:应变速率和变形温度的变化显著地影响合金流变应力的大小,流变应力随着变形温度的升高而降低,随应变速率的提高而增大,当流变应力达到峰值后趋于平稳。热变形过程的流变应力可采用双曲正弦本构关系来描述,平均激活能为611 kJ/mol。
On the Gleeble-1500 thermal simulator, when the strain rate is 0.1 ~ 10 s -1 and the deformation temperature is 800 ~ 860 ℃, the high-temperature compression test is used to investigate the flow stress behavior during hot compression deformation of Ti-5553 titanium alloy the study. The results show that the change of strain rate and deformation temperature significantly affect the flow stress of the alloy. The flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. When the flow stress reaches its peak Towards stability. The flow stress in the hot deformation process can be described by the hyperbolic sine constitutive equation with an average activation energy of 611 kJ / mol.