Abstract：CoCrFeNi high entropy alloy has become one of the most popular systems in the pursuit of high toughness
parts research because of its excellent plastic deformation ability and high yield strength of a single stable facecentric
cubic solid-solute structure. At the same time, selective laser melting technology has unparalleled advantages
over traditional preparation methods due to its flexible forming size and ultra-fast heating and cooling rates. In
this paper, the CoCrFeNi-X high-entropy alloy systems successfully created by the selective laser melting technology
in recent years and the effects of tissue structure on mechanical properties for eight different alloy systems in
terms of phase structure and tissue morphology were analyzed；the effects of the preparation process on forming
density and mechanical properties for three CoCrFeNi-X high entropy alloys formed parts were examined；Finally,
a detailed analysis of the current status of the two mainstream alloy systems, CoCrFeNi-Alx and CoCrFeNi-Mn,
was done on the alloy composition design. The research and analysis are expected to provide some theoretical guidance
for the experimental research and industrial application of preparing CoCrFeNi-X system high entropy alloys
by selective laser melting technology.
2023, Vol. 33 
