文献类型：期刊文献

英文题名：Hot Deformation Behavior and Microstructural Evolution of a Near-alpha Ti-5Al-1Sn-1 V-1Zr-0.8Mo Titanium Alloy during Isothermal Compression

作者：Yang, Zhijun[1];Lv, Haiwan[1];Chen, Houjin[1];Wei, Junyi[1];Li, Jinghua[2]

第一作者：Yang, Zhijun

通讯作者：Yang, ZJ[1]

机构：[1]Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Peoples R China;[2]Henan Univ Sci & Technol, Sch Med Technol & Engn, Luoyang 471023, 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, Peoples R China.|[1107111]新乡学院机电工程学院;[11071]新乡学院;

年份：2023

外文期刊名：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

收录：;EI(收录号：20232914409319);Scopus(收录号：2-s2.0-85164960601);WOS:【SCI-EXPANDED(收录号:WOS:001031436500004)】；

基金：AcknowledgmentsThis work was supported by the Key Specialized Research and Development Breakthrough in Henan province (No. 222102230003, 212102210434 and 212102210435). National Natural Science Foundation of China (No. 31800836); and China Postdoctoral Science Foundation (No. 2020M682285).

语种：英文

外文关键词：constructive equation; hot deformation; hot processing diagram; microstructural evolution; near-alpha titanium alloys

摘要：Herein, the hot deformation behavior of a near-alpha Ti-5Al-1Sn-1 V-1Zr-0.8Mo (Ti-5111) titanium alloy was studied at 870-1050 degrees C during isothermal compression tests at a strain rate of 0.01-10.0 s(-1). The microstructural evolution mechanism in the titanium alloy was systematically analyzed. Results show that the flow stress values rapidly increase to the peak value and gradually decrease as the strain variable increases. Further, the peak stress declines with the increasing deformation temperature. The apparent activation energy values of (alpha + beta) and beta regions are 438 and 206 kJ mol(-1), respectively. The variation of flow stress against temperature and strain rate is established using the constitutive equation. The safe processing zones are 890-960 degrees C and 960-1010 degrees C at strain rates of 0.01-0.3 s(-1) and 0.1-2 s(-1), respectively, as determined using the hot processing diagram. The maximum energy dissipation efficiency is 0.59 at 0.01 s(-1) and 930 degrees C, which is the optimum processing technique. The flow instability for the Ti-5111 alloy will occur at a high strain rate when shear bands and microscopic cracks appear in the deformed microstructures. Therefore, processing Ti-5111 alloy in unstable zones of the hot processing diagram should be avoided.