Microstructure evolution and corresponding tensile properties of Ti–5Al–5Mo–5V–1Cr–1Fe alloy controlling by multi-heat treatments
Microstructure evolution and corresponding tensile properties of Ti–5Al–5Mo–5V–1Cr–1Fe alloy controlling by multi-heat treatments作者机构：School of Materials Science and Engineering Inner Mongolia University of Technology Inner Mongolia Key Laboratory of Light Metal Materials Inner Mongolia University of Technology Northwest Institute for Non-ferrous Metal Research Shaanxi Key Laboratory of Biomedical Metal Materials
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2021年第31卷第5期
页 面：731-741页
核心收录：
学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：financially supported by National Natural Science Foundation of China (Grant No. 51861029 and 52071185) Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (Grant No. NJYT-19-B25) Inner Mongolia Natural Science Foundation (Grant No. 2020MS05034)
主 题：Titanium alloy Heat treatment Two-step aging Microstructures Tensile properties Twins
摘 要：The effects of microstructure morphology on corresponding tensile mechanical properties of Ti–5Al–5Mo–5V–1Cr–1Fe alloy controlling by three different heat treatment conditions (solution,single-step and two-step aging) were investigated in the present *** results show that the solution temperature exhibited an important impact on the precipitation behavior of secondary-αphase (αs) during aging,in which the content ofαsgradually increased with the increase of solution *** the alloy was single-step aged at500–600~°C,the needle-likeαsprecipitated from matrix,as well as the content ofαsdecreased and coarsened corresponding to the increase of aging *** with single-step aging,theαsslightly increased when the alloy was subjected to two-step aging heat *** tensile results show that theαsis the main strengthening phase in the ***,its content as well as the intensity of the precipitation mode directly affects the strength,whereas inevitably with an accompanying penalty on *** general,the higher solution temperature and the lower first-step aging temperature result in a more intensiveαsand then lead to the higher ***,{10■2}and{10■1}twins were found in two-step aged tensile samples,which may impart twinning-induced plasticity (TWIP).Overall,this study demonstrates that the alloy can be heat treated to achieve an excellent match between strength and ductility and to provide sufficient stress and optional ductility(ultimate strength of 978–1439 MPa and elongation of 8.25–18.9%).
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