Dual-Material Electron Beam Selective Melting:Hardware Development and Validation Studies

查看全文 作　　者：Chao [1,2,3]Guo;Wenjun [1,2,3]Ge;Feng [1,2,3]Lin

机构地区：[1]Department of Mechanical Engineering,Tsinghua University;[2]Key Laboratory for Advanced Materials Processing Technology (Ministry of Education of China),Tsinghua University;[3]Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing,Tsinghua University

出　　处：《Engineering》索引2015年第1卷第1期,共7页

基　　金：funding of 2013 Beijing Science and Technology Development Project (D13110400300000 and D131100003013002) 摘　　要：Electron beam selective melting(EBSM) is an additive manufacturing technique that directly fabricates three-dimensional parts in a layerwise fashion by using an electron beam to scan and melt metal powder. In recent years, EBSM has been successfully used in the additive manufacturing of a variety of materials. Previous research focused on the EBSM process of a single material. In this study, a novel EBSM process capable of building a gradient structure with dual metal materials was developed, and a powder-supplying method based on vibration was put forward. Two different powders can be supplied individually and then mixed. Two materials were used in this study: Ti6Al4 V powder and Ti47Al2Cr2 Nb powder. Ti6Al4 V has excellent strength and plasticity at room temperature, while Ti47Al2Cr2 Nb has excellent performance at high temperature, but is very brittle. A Ti6Al4V/Ti47Al2Cr2 Nb gradient material was successfully fabricated by the developed system. The microstructures and chemical compositions were characterized by optical microscopy, scanning microscopy, and electron microprobe analysis. Results showed that the interface thickness was about 300 μm. The interface was free of cracks, and the chemical compositions exhibited a staircase-like change within the interface. 关键词：电子束扫描硬件开发双材料熔化验证电子探针分析直接制造选择过程

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Dual-Material Electron Beam Selective Melting:Hardware Development and Validation Studies

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