摘要
The deformation behavior and mechanisms of Ti-1023 alloy were studied in the temperature range of 650-900 ℃ and strain rate range of 0.001-10 s-1 by compression and tensile tests. The results show that in a limited strain rate range of 0.001-0.1 s-1, the kinetic rate equation is obeyed and a linear fit is obtained at all the temperatures. The apparent activation energy is 322 kJ/mol in the α-β region and 160 kJ/mol in the β region, respectively. Power dissipation maps of this alloy developed by using Gleeble test data show three domains in the tested range. Superplasticity, marked by abnormal elongation at 700 ℃, occurs in the temperature range of 650-750 ℃ and at strain rates below about 0.03 s-1. Large grain superplasticity takes place in the temperature range of 750-850 ℃ and strain rates range of 0.001-0.03 s-1. Dynamic recrystallization occurs in the temperature range of 850-900 ℃ and at strain rates below about 1 s-1. The instability maps of this alloy were also developed.
The deformation behavior and mechanisms of Ti-1023 alloy were studied in the temperature range of 650-900 ℃ and strain rate range of 0.001-10 s^-1 by compression and tensile tests. The results show that in a limited strain rate range of 0.001-0.1 s^-1, the kinetic rate equation is obeyed and a linear fit is obtained at all the temperatures. The apparent activation energy is 322 kJ/mol in the α-β region and 160 kJ/mol in the β region, respectively. Power dissipation maps of this alloy developed by using Gleeble test data show three domains in the tested range. Superplasticity, marked by abnormal elongation at 700 ℃, occurs in the temperature range of 650-750 ℃ and at strain rates below about 0.03 s^-1. Large grain superplasticity takes place in the temperature range of 750-850 ℃ and sWain rates range of 0.001-0.03 s^-1. Dynamic recrystallization occurs in the temperature range of 850-900 ℃ and at strain rates below about 1 s^-1. The instability maps of this alloy were also developed.
出处
《中国有色金属学会会刊:英文版》
EI
CSCD
2006年第2期274-280,共7页
Transactions of Nonferrous Metals Society of China
关键词
钛合金
变形行为
变形机制
疲劳
应变
Ti-1023 alloy
deformation behavior
deformation mechanisms
processing maps
supcrplasticity