Flow Characteristics Analysis of TC18 Titanium Alloy during Hot Deformation Based on Phase Transformation

作     者：SUN Tao TENG Haihao JIANG Xiaojuan TENG Shuman ZHOU Jie SUN Tao;TENG Haihao;JIANG Xiaojuan;TENG Shuman;ZHOU Jie

作者机构：College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Key Laboratory of Advanced Die Intelligent Manufacturing of ChongqingChongqing 400044China School of Mechanical Engineering and AutomationChongqing Industry Polytechnic CollegeChongqing 401120China Liuzhou Steel GroupLiuzhou 545002China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2023年第38卷第6期

页      面：1418-1425页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Funded by the National Natural Science Foundation of China(No.52075058) the Natural Science Foundation of Chongqing(No.cstc2021jcyj-msxmX1112) the Research and Demonstration of Key Technologies for Forging High-performance Aluminum Alloys for Aerospace Applications(No.Z20210348)。 

主　　题：constitutive modeling TC18 titanium alloy phase transformation flow stress 

摘      要：An accurate flow stress model was established by considering the parameters of strain rate,strain and temperature as well asβ→a+βphase transformation in order to develop the plastic forming theory of TC18 titanium alloy.Firstly,the phase transition kinetics of TC18 titanium alloy during isothermal and continuous cooling at 1073 and 1273 K was studied by thermodynamic calculation,meanwhile,the relationship of volume fraction of phase transition with temperature and time was obtained.Constitutive models were calculated by investigating flow behaviors under hot compression tests with the strain rates of 0.001-1s^(-1) and temperatures of 973-1223 K in the singleβand a+βregions in TC18 titanium alloy,respectively.By combining the phase transformation dynamic kinetics with constitutive models,an accurate flow stress model was established,providing theoretical basis and data support for the hot forging of TC18 titanium alloy.