Phase transformation kinetics of Ti-1300 alloy during continuous heating

作     者：Ming-Pan Wan Yong-Qing Zhao Wei-Dong Zeng 

作者机构：State Key Laboratory of Solidification Processing Northwest Polytechnical University College of Materials and Metallurgy Guizhou University Northwest Institute for Nonferrous Metal Research 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2015年第34卷第4期

页      面：233-238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] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51401058) the Transformation Project of Major Scientific and Technological Achievements of Shanxi Province(No.2012KTCG04-14) the Science and Technology Innovation Team Project of Shanxi Province of China(No.2012KCT-23) 

主　　题：Ti-1300 alloy Phase transformation Dilatometry Kinetics 

摘      要：Abstract The α ＋ β→β phase transformation kinetics of Ti-1300 alloy during continuous heating at different heating rates were investigated using dilatometric method. Results show that the curves of the α ＋ β→β phase transformation exhibit a typical S-shaped pattern, which indicates that the α ＋ β→β phase transformation is a nucleation-growth-controlled process. The overall activation energy of the α ＋ β→β transformation of the alloy is 797 kJ·mol^-1. The nucleation and growth mechanism of the α ＋ β→β transformation was also investigated using the non-isothermal Avrami exponent. The Avrami exponent during α ＋ β→β transformation process significantly changes with transformed volume fraction increasing, which indicates that the α ＋ β→β transformation mechanism in the Ti-1300 alloy varies at different sections.