摘要
Ti-6Al-4V specimens were fabricated by selective laser melting(SLM)to study the effect of thermal treatment on the phase transformation,elemental diffusion,microstructure,and mechanical properties.The results show that vanadium enriches around the boundary ofαphases with increasing annealing temperature to 973 K,andα′phases transform intoα+βat 973 K.The typicalα′martensite microstructure transforms to fine-scale equiaxed microstructure at 973 K and the equiaxed microstructure significantly coarsens with increasing annealing temperature to 1273 K.The SLM Ti-6Al-4V alloy annealed at 973 K exhibits a well-balanced combination of strength and ductility((1305±25)MPa and(37±3)%,respectively).
利用激光选区熔化技术(SLM)制备Ti-6Al-4V合金,并研究退火处理对该合金的相转变、元素扩散、显微组织结构以及力学性能的影响。结果表明,随着退火温度的升高,钒元素富集在α′相并且α′相在973 K转变为α+β双相组织。在973 K,α′相所形成的马氏体组织转变为细小等轴显微组织,且该等轴组织随温度的升高发生显著粗化。经过973 K退火的SLM Ti-6Al-4V合金表现出良好且均衡的强度和延展性,分别为(1305±25)MPa,(37±3)%。
作者
WANG Pei
CHEN Feng-hua
J.ECKERT
S.PILZ
S.SCUDINO
K.G.PRASHANTH
王沛;陈风华;JECKERT;SPILZ;SSCUDINO;KGPRASHANTH(Additive Manufacturing Institute,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China;Erich Schmid Institute of Materials Science,Austrian Academy of Sciences,Jahnstraße 12,A-8700 Leoben,Austria;Departmentof Materials Science,Chair of Materials Physics,Montanuniversität Leoben,Jahnstraße 12,A-8700 Leoben,Austria;Institute for Complex Materials,Leibniz IFW Dresden,Helmholtzstraße 20,D-01069 Dresden,Germany;Department of Mechanical and Industrial Engineering,Tallinn University of Technology,Ehitajete tee 5,19086 Tallinn,Estonia;CBCMT,School of Mechanical Engineering,Vellore Institute of Technology,Vellore-632014,Tamil Nadu,India)
基金
Project(2020A1515110869)supported by Guangdong Basic and Applied Basic Research Foundation,China
Project(GJHZ20190822095418365)supported by Shenzhen International Cooperation Research,China
Project(51775351)supported by the National Natural Science Foundation of China
Project(2019011)supported by the NTUT-SZU Joint Research Program,China
Project(2019040)supported by the Natural Science Foundation of SZU,China
Project(ASTRA6-6)supported by the European Regional Development Fund,European Union。
作者简介
Corresponding author:王沛,PhD,Assistant Professor,Tel:+86-755-26536224,E-mail:peiwang@szu.edu.cn,ORCID:https://orcid.org/0000-0002-4141-0511;Corresponding author:K.G.PRASHANTH,PhD,Professor,Tel:+372-5452-5540,E-mail:kgprash anth@gmail.com,ORCID:https://orcid.org/0000-0001-5644-2527。
