Hot Deformation Behavior and Microstructure Evolution of BT25 Alloy with Lamellar Starting Microstructure

摘要：

In the present investigation,samples of BT25 titanium alloy with lamellar starting microstructure were compressed with the Gleeble-1500 simulator machine. The compression tests were carried out in the temperature range from 940 to 1000℃ and strain rates from 0.01 to 10s-1. Characteristics of flow stressstrain curves of the alloy were analyzed. The constitutive relation of BT25 alloy at high temperature is described by hyperbolic-sine-type equation and Zener-Hollomon parameter,and the deformation activation energy (Q) is calculated to be 623. 26 kJ. mol-1 in α+β phase region. The main evolution character of the microstructure is the globularization of lamellae,and the degree of globularization of lamellae increased with increasing strain,increasing deformation temperature and decreasing strain rate.

关键词： BT25 titanium alloy hot deformation flow behavior constitutive equation microstructure

作者: Xiong Ma Weidong Zeng Fei Tian Jianhua Zhou Xiaoying Wang Bin Xu

作者单位: State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072 Baoshan Iron & Steel Co.,Ltd.,Shanghai 200940,China

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 261-264

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）