TC4-DT钛合金热变形本构方程  

Hot deformation constitutive equation of TC4-DT titanium alloy

作　　者：杨建辉[1,2] 张鹏[2] 赵升吨[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]中国第二重型机械集团公司,德阳618000

出　　处：《塑性工程学报》2016年第2期120-125,共6页Journal of Plasticity Engineering

基　　金：国家重大专项资助项目(2012ZX04010-081)

摘　　要：利用Gleeble-3800热模拟试验机进行热压缩实验,研究了TC4-DT钛合金在温度1163K^1293K、应变速率为0.005s^(-1)~0.5s^(-1)、变形量为60%条件下的热变形行为。根据应力-应变曲线分析该合金的流变应力变化特点,建立该合金的Arrhenius双曲正弦型本构方程。结果表明,所建立的本构方程与实验值吻合程度较高,为制定TC4-DT钛合金热加工工艺规范提供理论依据。Hot compressive deformation of TC4-DT titanium alloy was carried out with the hot simulation machine of Gleeble-3800 at the deformation degree of 0.6,the deformation temperature range from 1 163 Kto 1 293 Kand the strain rate range from0.005s^-1 to 0.5s^-1.The characteristic of flow stress were analyzed,the Arrhenius hyperbolic sine constitutive equation was set up.The results indicate that the calculation results by the constitutive equation fit close the experiment results.These results lay the foundation for the hot process specification of TC4-DT titanium alloy.

关 键 词：TC4-DT钛合金 热变形 应力-应变曲线 本构方程 

分 类 号：TG146.23[一般工业技术—材料科学与工程]