Ti40阻燃钛合金高温变形本构关系研究  

Study on constitutive relationship of Ti40 burn-resistant titanium alloy during high temperature deformation

作　　者：胡萌[1] 鲁世强[2] 李鑫[1] 黄旭[3] 曹京霞[3] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]南昌航空大学材料科学与工程学院,江西南昌330063 [3]北京航空材料研究院,北京100095

出　　处：《锻压技术》2011年第2期119-123,共5页Forging & Stamping Technology

基　　金：国家重点基础研究发展计划资助项目(2007CB613803);国家自然科学基金资助项目(51005112);航空科学基金资助项目(2009ZE56014)

摘　　要：利用Gleeble热模拟机对Ti40合金在变形温度为950~1100℃、应变速率为0.001~1 s-1范围内进行了等温恒应变速率压缩实验。通过分析真应力-真应变曲线,研究了热力参数对流动应力的影响规律,并建立了Ti40合金的本构关系。误差分析表明,该本构方程具有很高的精度,可用于指导Ti40合金热加工工艺制定,并可用于Ti40合金热变形过程的有限元模拟。The isothermal and constant strain rate compression tests for Ti40 alloy were carried out in the temperature range of 950-1100 ℃ and strain rate range of 0.001-1s-1 by using the Gleeble hot working simulator.By analyzing the true stress-true strain curves of Ti40 alloy,the influence of thermomechanical parameter on flow stress was studied and constitutive relationship for Ti40 alloy was constructed.Error analysis shows that the constructed constitutive relationship has a good accuracy,and it can be used for guiding the hot working process and applied in finite element simulation of Ti40 alloy.

关 键 词：TI40合金 流动应力 本构关系 热加工工艺 

分 类 号：TG146.23[一般工业技术—材料科学与工程]