Characterization of Hot Deformation Behavior of Ti60 Alloy by Using Processing Map
The hot deformation behavior of Ti60 titanium alloy was investigated at the temperatures ranging from 960℃ to111℃ and the strain rates ranging from 0.001 s-1 to 10 s-1 using hot compression tests. Processing map for hot working was developed on the basis of the Dynamic Materials Model. Its stress-strain curves revealed greater flow softening in the α+β field than that in the β field. In α+β field,flow softening was caused by break-up and globularisation of lamellar α as well as deformation heating during deformation. While in the ft field,flow softening was caused by dynamic recovery and recrystallization. The material exhibited superplasticity with a peak efficiency of 60％ at 990℃ and 0.001 s-1, which was the optimum parameters for a+f! field working. There were two instability fields in the processing map:960-970℃ at 0. 18-10 s-1 and 1010-1110℃ at 0.75-10 s-1. These fields should be avoided due to the formation of the adiabatic shear bands during the deformation of Ti60 alloy.
Titanium alloy processing map hot deformation
Weiju Jia Weidong Zeng Yigang Zhou Jianrong Liu Qingjiang Wang
State Key Laboratory of Solidification Processing,School of Materials Science and Engineering,North- Institute of Metal Research,Chinese Academy of Sciences,Shenyang,China 110016
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
265-268
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）