Abstract
The CoCrFeMnNi high-entropy alloy is considered to be one of the excellent potential material for metal additive manufacturing. In this study, Elemental powders of Co, Cr, Fe, Mn, Ni were blended for bulk samples fabricating to study microstructure, phase composition and mechanical properties. The blended powder shows good printability with various selective laser melting (SLM) parameters and the as-built high-entropy alloy (HEA) samples achieve a reliable forming quality. It has been shown that the as-built HEA presents a single Face Centered Cubic (FCC) matrix and few residual Cr particles, and FCC matrix exhibits a typical hierarchical microstructure. The bulk samples were produced using 320 W laser power, 750 mm/s scan speed and 0.09 mm hatch distance show the best strength and toughness matching. The study has verifified the feasibility of using blended powder to prepare high-quality HEA by SLM.
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