Numerical simulation research on hot stretch straightening of thin-walled T-shaped profile of titanium alloy assisted by resistance heating

作     者：Deng, Xuwen Hui, Songxiao Ye, Wenjun Liu, Rui Huang, Liang 

作者机构：GRINM Grp Co LTD State Key Lab Nonferrous Met & Proc Beijing 100088 Peoples R China GRIMAT Engn Inst Co LTD Beijing 101407 Peoples R China Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY》 (国际先进制造技术杂志)

年 卷 期：2022年第121卷第9-10期

页      面：6483-6495页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0802[工学-机械工程] 0811[工学-控制科学与工程] 

基　　金：National Key R&D Program of China [2017YFB0303204] 

主　　题：Titanium alloy thin-walled T profile Resistance heating Hot stretch straightening Numerical simulation 

摘      要：In accordance with the bending deformation of titanium alloy profile generated by hot extrusion, the hot stretch straightening assisted by resistance heating is an effective strategy to improve the straightness accuracy. In order to reveal the heat transfer behavior and deformation mechanism of titanium alloy profile during hot straightening, this study focuses on Ti-6.5Al-2Zr-1Mo-1 V alloy thin-walled T-shaped profile with unequal thicknesses. The flow stress curves of profile within temperatures from 400 to 800 celcius, strain rate at 5 center dot 10(-4) s(-1) were obtained by uniaxial tensile tests. The thermal boundary conditions between profile and air were determined by using inverse analysis experiment. Then, the thermal-electrical-mechanical multi-field coupling numerical simulation model was established. The temperature distribution, stress distribution, and deformation of profile were investigated systematically. The results show that the non-uniform temperature field with low temperature in thinner wall region and high temperature in thicker wall region would form during resistance heating. The stress distribution of stretch straightening process was determined by the temperature distribution and the initial bending shape of profile jointly, thereby affecting the springback deflection and direction after unloading. The established numerical simulation models, which have been verified by process experiments, could lay foundation for the prediction and process optimization in hot stretch straightening of titanium profile.