Microstructure and wear performance of CoCrFeNi multi-principal element alloy coating deposited using laser cladding

ZY Wang and MJ Xia and CL Kong, INTERMETALLICS, 184, 108829 (2025).

DOI: 10.1016/j.intermet.2025.108829

CoCrFeNi multi-principal element alloy (MPEA) coatings prepared using laser cladding (LC) with unique properties have aroused great interest in recent years and have been widely studied. However, there is little research on the influence of various process parameters during the LC process on the coating. In this study, CoCrFeNi MPEA LC coatings were prepared within the process range of laser power at 650-800 W and powder feeding speed 9-13g.min-1. The grain structures and microscopic morphologies of coatings were characterized, and the wear mechanisms were analyzed using the nano-indentation and wear tests. The results show that the prepared MPEA coatings are of good quality and contain a single FCC phase. When the laser power increases to 800 W, excessive laser power causes some Ti atoms to enter the coating to form a Ti-rich phase. The titanium-rich phase has high hardness, but it is easy to generate brittle TiO2 in the wear test, which is not conducive to the improvement of wear performance. The coatings carried the load and improved the wear resistance of the substrate. Through this study, the application field of high-hardness MEA coating can be further expanded.

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