您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

[PDF Download]    [Flash Online]

    

Hot deformation behavior and constitutive equations of titanium alloy Ti26
DU Yu(杜  宇), QI Yun-lian(戚运莲), ZHAO Yong-qiang(赵永庆), WANG Rui-ning(王蕊宁),
 LIU Wei(刘  伟), XI Zheng-ping(奚正平), HONG Quan(洪  权)

Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Abstract:Samples of Ti26 (Ti-V-Sn-Cr-Al-Zr-Nb) alloy were compressed on the Gleeble−1500 heat stimulation machine. The compression test was carried out at 900−1 150 ℃ and strain rates from 0.001 s−1 to 10 s−1. Flow stress data at various temperatures and strain rate were obtained; and the compressive true stress vs. true strain curves were measured and studied. The deformation activation energy was calculated. The results show that the flow stress of Ti26 alloy decreases with the increase of temperature and the decrease of strain rate, and the deformation activation energy is 278.11 kJ/mol in b phase region. The flow stress curves and deformation activation energy reveal that the main softening mechanism is dynamic recovery in b phase region. Constitutive equations were formulated to describe the temperature dependence of the flow stress over a wide range of strain rates.

 

Key words: Ti26 titanium alloy; hot deformation; activation energy

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn