基于Z参数的TC18钛合金热变形本构方程建立  

Establishment of Constitutive Equation of TC18 Titanium Alloy Thermal Deformation Based on Z Parameter

作　　者：苏艳红[1] 马亚鑫 门正兴[1] 屈仁春[1] 岳太文[1] SU Yanhong;MA Yaxin;MEN Zhengxing;QU Renchun;YUE Taiwen(Chengdu Aeronautic Polytechnic,Chengdu 610021,China)

机构地区：[1]成都航空职业技术学院,四川成都610021

出　　处：《铸造技术》2018年第8期1673-1675,共3页Foundry Technology

基　　金：四川省教育厅科研资助项目(17ZB0035;18ZA0032;18ZA0037)

摘　　要：Zener-Hollomon参数将金属材料本构方程中变量简化为应力、应变和Z参数,极大简化了材料本构方程的数学模型。结果表明,采用等温恒应变速率热压缩实验得到了TC18钛合金流变应力曲线,应用非线性拟合方法计算得到了基于Z参数的峰值应力σ_p以及峰值应变ε_p函数模型,应用多元非线性拟合方法计算了基于Z参数、峰值应力σ_p以及峰值应变ε_p的TC18钛合金本构模型。The Zcner-Hollomon parameter greatly simplifies the constitutive equations of metallic materials, and the new equations only includes three variables of stress, strain and Z parameter. The results show that the flow stress curves of TC18 titanium alloy are obtained by the isothermal constant strain rate thermal compression experiment. The model of the peak stress and the peak strain based on Z-parameter are calculated by linear fitting method. A multicomponent non-linear fitting method is used to calculate the TC18 titanium alloy constitutive model based on Z-parameter, peak stress Qp and peak strain ep.

关 键 词：TC18钛合金 Zcncr-Hollomon参数 峰值应力 峰值应变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]