文献类型：期刊文献

英文题名：Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy

作者：Yang, Zhijun[1];Yu, Weixin[1];Lang, Shaoting[1];Wei, Junyi[1];Wang, Guanglong[1];Ding, Peng[1]

第一作者：Yang, Zhijun

通讯作者：Yang, ZJ[1]

机构：[1]Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院机电工程学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China.|[1107111]新乡学院机电工程学院;[11071]新乡学院;

年份：2021

卷号：14

期号：9

外文期刊名：MATERIALS

收录：;EI(收录号：20212410494280);Scopus(收录号：2-s2.0-85107610817);WOS:【SCI-EXPANDED(收录号:WOS:000650543900001)】；

基金：The research was funded by the Key Specialized Research and Development Breakthrough in Henan province (212102210434), the National Natural Science Foundation of China (51801171), and the Key Scientific Research Projects of Colleges and Universities in Henan Province (19B430008).

语种：英文

外文关键词：titanium alloy; thermal deformation; constructive equation; processing maps

摘要：The hot deformation behaviors of a new Ti-6Al-2Nb-2Zr-0.4B titanium alloy in the strain rate range 0.01-10.0 s(-1) and temperature range 850-1060 degrees C were evaluated using hot compressing testing on a Gleeble-3800 simulator at 60% of deformation degree. The flow stress characteristics of the alloy were analyzed according to the true stress-strain curve. The constitutive equation was established to describe the change of deformation temperature and flow stress with strain rate. The thermal deformation activation energy Q was equal to 551.7 kJ/mol. The constitutive equation was epsilon =e(54.41)[sinh (0.01 sigma)](2.35)exp(-551.7/RT). On the basis of the dynamic material model and the instability criterion, the processing maps were established at the strain of 0.5. The experimental results revealed that in the (alpha + beta) region deformation, the power dissipation rate reached 53% in the range of 0.01-0.05 s(-1) and temperature range of 920-980 degrees C, and the deformation mechanism was dynamic recovery. In the beta region deformation, the power dissipation rate reached 48% in the range of 0.01-0.1 s(-1) and temperature range of 1010-1040 degrees C, and the deformation mechanism involved dynamic recovery and dynamic recrystallization.