Dual-Material Electron Beam Selective Melting: Hardware Development and Validation Studies
作者： Chao Guo , Wenjun Ge , Feng Lin
关键词: Optical microscope 、 Brittleness 、 Materials science 、 Electron microprobe 、 Composite material 、 Metal powder 、 Titanium alloy 、 Cathode ray 、 Microstructure 、 Selective laser melting
摘要: ABSTRACT Electron beam selective melting (EBSM) is an additive manufacturing technique that directly fabricates three-dimensional parts in a layerwise fashion by using electron to scan and melt metal powder. In recent years, EBSM has been successfully used the of variety materials. Previous research focused on process single material. this study, novel capable building gradient structure with dual materials was developed, powder-supplying method based vibration put forward. Two different powders can be supplied individually then mixed. were study: Ti6Al4V powder Ti47Al2Cr2Nb excellent strength plasticity at room temperature, while performance high but very brittle. A Ti6Al4V/Ti47Al2Cr2Nb material fabricated developed system. The microstructures chemical compositions characterized optical microscopy, scanning microprobe analysis. Results showed interface thickness about 300 μm. free cracks, exhibited staircase-like change within interface.
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