Variant selection induced by electropulsing:Optimization in the microstructure of selective laser melted Ti-6Al-4 V alloy
作者机构：Key Laboratory of Automobile MaterialsMinistry of Educationand Department of Materials Science and EngineeringJilin UniversityChangchun 130025China Weihai Bionics Research Institute-Jilin UniversityWeihai 264402China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130025China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第159卷第28期
页 面：219-224页
核心收录：
学科分类：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：the National Key Re-search and Development Program of China(Nos.2020YFB2008300,2020YFB2008303 and 2020YFB2008304) the Provincial Natural Science Foundation of Shandong(Grant No.ZR202102220408) the National Natural Science Foundation of China(Grant No.51701080) the Talent Development-Excellent Young Talents Fund Project,China(Grant No.20190103053JH)
主 题：microstructure alloy martensite
摘 要：Selective laser melting(SLM)is one of the most popular addi-tive manufacturing(AM)*** a near-net shape man-ufacturing method,it offers many advantages from the manufac-turing perspective and has attracted more and more current re-search interests in fabricating the workhorse titanium alloy Ti-6Al-4 V[1].Since the high cooling rate of the molten pool and complicated thermal cycle will result in a fine and metastableαmicrostructure,generally,post-process is required to optimize the microstructure for the widespread application *** iso-static pressing(HIP)and traditional heat treatment are the main post-treatments for the SLM-built Ti-6Al-4 V component[2].How-ever,HIP is a high-cost process and most heat treatments could not achieve a microstructure with high strength-ductility synergy and thermostability,e.g.,sub-transus water quenched microstruc-ture showed superior mechanical properties,but the martensite is far from thermodynamic equilibrium;the sup-transus air cooled microstructure has high thermostability but exhibits low elonga-tion[3,4].
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