Coarsening Kinetics and Morphological Evolution in a Two-Phase Titanium Alloy During Heat Treatment

被引：12
|
作者：
Xu, Jianwei [1 ]
Zeng, Weidong [1 ]
Jia, Zhiqiang [1 ]
Sun, Xin [1 ]
Zhao, Yawei [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2016年 / 25卷 / 03期
基金：
高等学校博士学科点专项科研基金;
关键词：
alpha/beta heat treatment; mathematical modeling; microstructure evolution; Ti-17; alloy; INITIAL LAMELLAR MICROSTRUCTURE; STATIC RECRYSTALLIZATION; DYNAMIC GLOBULARIZATION; TI-17; ALLOY; TI-6AL-4V; MECHANISMS; BEHAVIOR; SPHEROIDIZATION;
D O I：
10.1007/s11665-016-1951-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of alpha/beta heat treatment on microstructure evolution of Ti-17 alloy with a lamellar colony structure are established. Heat treatment experiments are conducted at 1103 or 1063 K for times ranging from 10 min to 8 h. The main features of microstructure evolution during heat treatment comprise static globularization and coarsening of primary alpha phase. Such behaviors can be accelerated by higher heat treatment temperature. Furthermore, globularization and coarsening behaviors show a faster rate at higher prestrain. In order to better understand the microstructure evolution of Ti-17 alloy during alpha/beta heat treatment, static globularization and coarsening behaviors are modeled in the theoretical frame of the Johnson-Mehl-Avarmi-Kolmogorov (JMAK) and Lifshitz-Slyozov-Wagner (LSW) theories, respectively. The JMAK and LSW kinetics parameters are derived under different experimental conditions. Agreements between measurements and predictions are found, indicating that the JMAK and LSW theories can be used to predict and trace static globularization and coarsening processes of Ti-17 alloy during alpha/beta heat treatment.
引用
收藏
页码：734 / 743
页数：10
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