TY - JOUR
T1 - Coarsening Kinetics and Morphological Evolution in a Two-Phase Titanium Alloy During Heat Treatment
AU - Xu, Jianwei
AU - Zeng, Weidong
AU - Jia, Zhiqiang
AU - Sun, Xin
AU - Zhao, Yawei
N1 - Publisher Copyright:
© 2016, ASM International.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - 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.
AB - 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.
KW - alpha/beta heat treatment
KW - mathematical modeling
KW - microstructure evolution
KW - Ti-17 alloy
UR - http://www.scopus.com/inward/record.url?scp=84961170738&partnerID=8YFLogxK
U2 - 10.1007/s11665-016-1951-5
DO - 10.1007/s11665-016-1951-5
M3 - 文章
AN - SCOPUS:84961170738
SN - 1059-9495
VL - 25
SP - 734
EP - 743
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
IS - 3
ER -