Fabricating CoCrFeMnNi high entropy alloy via selective laser melting in-situ alloying
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第8期
论文作者：Peng Chen Sheng Li Yinghao Zhou Ming Yan Moataz M.Attallah
文章页码：40 - 43
摘 要：Quasi-equiatomic Co Cr Fe Mn Ni high entropy alloy（HEA） has been in-situ alloyed by selective laser melting（SLM） from a blend of Co Cr Fe Ni pre-alloyed powder and Mn elemental powder. The blended powder shows good printability with various SLM parameters and the as-built HEA samples achieve a reliable forming quality. Despite the slight evaporation of Mn, energy dispersive spectrometer mapping and Xray diffraction results show that the as-built HEA has a homogeneous chemical distribution and presents a single face-centred-cubic（fcc） phase, indicating successful in-situ alloying. The study has verified the feasibility of using blended powder to prepare high-quality HEA by SLM.
Peng Chen1,2，Sheng Li1，Yinghao Zhou2，Ming Yan2，Moataz M.Attallah1
1. Advanced Materials Processing Laboratory, University of Birmingham2. Department of Materials Science and Engineering, and Shenzhen Key Laboratory for Additive Manufacturing of High Performance Materials, Southern University of Science and Technology
摘 要：Quasi-equiatomic Co Cr Fe Mn Ni high entropy alloy（HEA） has been in-situ alloyed by selective laser melting（SLM） from a blend of Co Cr Fe Ni pre-alloyed powder and Mn elemental powder. The blended powder shows good printability with various SLM parameters and the as-built HEA samples achieve a reliable forming quality. Despite the slight evaporation of Mn, energy dispersive spectrometer mapping and Xray diffraction results show that the as-built HEA has a homogeneous chemical distribution and presents a single face-centred-cubic（fcc） phase, indicating successful in-situ alloying. The study has verified the feasibility of using blended powder to prepare high-quality HEA by SLM.
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