TA22钛合金高温变形行为及本构关系  

High Temperature Deformation Behavior and Constitutive Equations of TA22 Titanium Alloy

作　　者：孙二举[1] 邱胜闻 许飞凡 刘志颖[1] SUN Erju;QIU Shengwen;XU Feifan;LIU Zhiying(Luoyang Ship Material Research Institute,Luoyang 471023,China;Military Representative Office of Dalian,Dalian 116000,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]海军驻大连地区第一军事代表室,辽宁大连116000

出　　处：《材料开发与应用》2020年第4期6-10,共5页Development and Application of Materials

摘　　要：通过等温恒应变速率压缩试验研究了热变形参数对TA22钛合金高温变形行为的影响.结果表明:随着温度的升高和应变速率的降低,TA22钛合金流动应力具有明显降低的趋势,对应变速率和温度较为敏感.在幂函数型Arrhenius方程和Z-H参数的基础上,引入累计塑性应变参数,建立了TA22钛合金的本构关系.流动应力计算值与实测值之间的相对误差为7.3%,本研究建立的本构关系可以相对准确地反映TA22钛合金高温变形过程中的流变行为.The effects of thermo deformation parameters on the flow stress of TA22 alloy are investigated based on the results of the isothermal constant strain rate compression tests. The results show that the flow stress of TA22 alloy is sensitive to strain rate and temperature, reducing with the increase of temperature and the decrease of strain rate. The constitutive equation of TA22 alloy is established base on power function equation and Z-H parameter and by introducing strain parameter. The relative error between the calculated and experimental flow stresses is 7.3%. The constitutive equation can describe the flow behavior of TA22 alloy in the course of high temperature deformation exactly.

关 键 词：TA22钛合金 热模拟 高温变形行为 本构关系 

分 类 号：TG316[金属学及工艺—金属压力加工]