基于数理统计方法的TB6钛合金本构关系
Constitutive Relationship of TB6 Titanium Alloy Based on Mathematical Statistics Method
廖建宇1, 胡 萌2, 徐 东1, 鲁世强1
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作者单位：1. 南昌航空大学 材料科学与工程学院, 江西 南昌 330063; 2. 南昌航空大学 航空制造工程学院, 江西 南昌 330063
中文关键字：TB6钛合金； 热变形； 流动应力； 本构关系
英文关键字：TB6 titanium alloy; hot deformation; flow stress; constitutive relationship
中文摘要：采用Thermecmaster-Z型热模拟试验机对TB6钛合金在800～1150 ℃、0.001～10 s-1条件下进行等温恒应变速率压缩试验。通过分析TB6钛合金在不同热变形条件下的真应力-真应变曲线，并在综合考虑应变速率、变形温度和应变量对流动应力影响的基础上，建立了TB6钛合金的本构关系。误差分析表明，所建的本构关系具有较好的精度，能较好地反映TB6钛合金的热变形行为特征。
英文摘要：The compression tests for TB6 titanium alloy under isothermal and constant strain rate were carried out at the temperature range of 800 ℃～1150 ℃ and strain rate range of 0.001 s-1～10 s-1 by the thermecmaster-Z hot working simulator. The constitutive relationship of TB6 titanium alloy was constructed by analyzing true stress-strain curve under different hot deformation conditions and considering the effect of the strain rate, deformation temperature and strain on flow stress synthetically. Error analysis shows that the constructed constitutive relationship has good accuracy and can preferably describe hot deformation behavior of TB6 titanium alloy.