文献类型：期刊文献

英文题名：Microstructures and mechanical properties of a titanium alloy thick plate joint after electron beam welding plus solution-aging

作者：Yang, Zhijun[1];Li, Jingxian[1];Zhang, Binbin[2];Li, Jinghua[3]

第一作者：Yang, Zhijun

通讯作者：Yang, ZJ[1];Zhang, BB[2]

机构：[1]Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Peoples R China;[2]Wenzhou Univ, Sch Mech & Elect Engn, Wenzhou 325000, Peoples R China;[3]Henan Univ Sci & Technol, Sch Med Technol & Engn, Luoyang, 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;[2]corresponding author), Wenzhou Univ, Sch Mech & Elect Engn, Wenzhou 325000, Peoples R China.|[1107111]新乡学院机电工程学院;[11071]新乡学院;

年份：2022

卷号：19

起止页码：913-922

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20223712731855);Scopus(收录号：2-s2.0-85137708277);WOS:【SCI-EXPANDED(收录号:WOS:000823354100002)】；

基金：The research was funded by the key specialized research and development breakthrough in Henan province, China (212102210434 and 222102230003) , the Key Scientific Research Projects of Colleges and Universities in Henan Province, China (22B430026) , National Natural Science Foundation of China (31800836) , China Postdoctoral Science Foundation (No. 2020M682285) , Innovation Scientists and Technicians Troop Construction Projects of Henan Province, China (No. 21HASTIT046) .

语种：英文

外文关键词：Titanium alloy; Electron beam welding; Microstructures; Mechanical properties; Heat treatment

摘要：A thick plate of Ti-6Al-2Zr-2Sn-3Mo-1.5Cr-2Nb (TC21) damage-tolerant alloy was electron-beam welded and the joint was treated via solution aging. The microstructural characterizations and mechanical properties of the welding and solution-aging states were also investigated. The results indicated that in the welding state, the fusion zone (FZ) is composed of grain boundary a, martensite a0, and residual 13 phases. The heat-affected zone (HAZ) consists mainly of primary a, martensite a0, and residual 13 phases. The microhardness value of the FZ is higher than that of HAZ and base metal (BM), and the hardness value of the welded joint from the FZ to BM fluctuates greatly. The ultimate tensile strength (UTS) and elongation (EL) of the welded joint are 1183 MPa and 7.5%, respectively. The weak spot of impact toughness on the welded joint is the FZ, about 11 J. After solution aging, the martensite a0 in the FZ and HAZ transforms completely into lamellar a. Compared with the welding state, the fluctuation in the hardness value markedly decreases. The UTS and EL of the welded joint are 1145 MPa (a 3% decrease) and 12.5% (a 66.7% increase), respectively. The impact toughness of the FZ is 27 J, an increase of approximately 145%. The strength of the welded joint is well matched with their plasticity and toughness.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).