文献类型：期刊文献

英文题名：Effects of microstructure characteristics on the mechanical properties and elastic modulus of a new Ti-6Al-2Nb-2Zr-0.4B alloy

作者：Yang, Zhijun[1];Cao, Junhui[1];Yu, Weixin[1];Hou, Shusen[1];Wang, Guanglong[1];Lang, Shaoting[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：820

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20212410500922);Scopus(收录号：2-s2.0-85107620769);WOS:【SCI-EXPANDED(收录号:WOS:000668743600003)】；

基金：The research was funded by key specialized research and development breakthrough in Henan province (212102210434) , 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 alloys; TiB phase; Mechanical properties; Elastic modulus; Microstructure

摘要：A new Ti-6Al-2Nb-2Zr-0.4B alloy was prepared via a vacuum arc remelting process. Furthermore, the changes in the microstructure, mechanical properties, and elastic modulus of the alloy during thermal deformation for forging and rolling were studied. The alloy contained alpha, beta, and TiB phases, and there was a particular phase relationship between TiB and the Ti matrix. The TiB phase was mainly long needle-like in the as-cast samples, short rods with a chain-like distribution in the forging structure, and granular and dispersed evenly after rolling. The mechanical properties' test results show that the ultimate tensile strength, the elongation at break, and impact toughness from the ingot to forging to plate samples increase from 698 MPa, 5%, and 5 J to 814 MPa, 13.5%, and 41 J and then to 838 MPa, 16%, and 48 J, respectively. Conversely, the elastic modulus decreased gradually from 128.8 to 124.3 and finally to 122.2 GPa. Fractography analysis of the samples revealed a completely ductile fracture mode in the plate samples and a mixed mode of brittle and ductile fractures in the forging samples. Conversely, the ingot samples showed a brittle cleavage fracture with a river pattern.