TA2工业纯钛焊接接头中低温拉伸力学性能及本构模型  

Tensile mechanical properties and constitutive model of commercial pure titanium TA2 welded joints at medium-low temperature

作　　者：赵青[1,2] 常乐 郑逸翔[1] 宋高峰[1] 叶有俊[1] 谢毅[1] 谭雪龙[1] Zhao Qing;Chang Le;Zheng Yixiang;Song Gaofeng;Ye Youjun;Xie Yi;Tan Xuelong(Jiangsu Province Special Equipment Safety Supervision Inspection Institute,Nanjing 210036,Jiangsu,China;Nan-jing Tech University,Nanjing 211816,Jiangsu,China)

机构地区：[1]江苏省特种设备安全监督检验研究院,江苏南京210036 [2]南京工业大学,江苏南京211816

出　　处：《钢铁钒钛》2022年第5期81-89,共9页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(51905260);江苏省特检院科研项目(KJ(Y)2020032)。

摘　　要：以TA2工业纯钛焊接接头为研究对象,开展了不同温度和应变速率下的拉伸试验,分析了温度及应变速率对于材料强度及流变应力的影响。结果表明:TA2焊接接头的屈服强度与温度呈线性关系,与应变速率呈指数关系,并建立了屈服强度与温度和应变速率的经验公式。基于Arrhenius、Johnson-Cook (JC)及Modified Zerilli-Armstrong (MZA)本构方程,对工业纯钛焊接接头的中低温拉伸流变应力进行预测。将三种模型的预测值与试验值进行定量对比,发现JC模型预测精度最低,MZA模型预测精度最高。研究结果为钛材在承压设备中的应用提供数据支撑,有利于更好地设计、加工、制造和使用钛制承压设备。In this paper, tensile tests of commercial pure titanium TA2 welded joints at different temperatures and strain rates were carried out to analyze the effects of temperature and strain rate on the flow stress and strength of the material. The yield strength of TA2 welded joints present a linear relationship with temperature and an exponential relationship with strain rate. The empirical formula between yield stress and temperature and strain rate was established. Based on the constitutive equations of Arrhenius,Johnson-Cook(JC) and Modified Zerili-Armstrong(MZA), the tensile flow stress of commercial pure titanium welded joints at medium-low temperature was predicted. The prediction accuracy of different constitutive models was quantitatively compared with experimental results. It was found that JC model has the lowest prediction accuracy and MZA model has the highest prediction accuracy. Current study provides data support for the application of titanium materials in pressure equipment, and it is useful for the design, manufacturing, fabrication and use of titanium pressure equipment.

关 键 词：TA2工业纯钛 焊接接头 中低温拉伸 力学性能 应力应变 本构模型 

分 类 号：TF823[冶金工程—有色金属冶金]