Abstract
FeMnNiCrCu0.5high-entropy alloy (HEA) coating was prepared on the C45 steel by laser cladding. Constituent phase, microstructure and chemical composition of the coating was investigated usingX-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), respectively. The microhardness and corrosion resistance of the coating are also studied. Results showed that the HEA coating reveals a good metallurgical bonding to the substrate, and they consist of the heat-affected zone, bonding zone and cladding zone. The microstructure of the coating showed a typical dendrite crystal growing from the substrate. FeMnNiCrCu0.5 coating was composed a single face-center cubic (FCC) phase, and the surface hardness of the coating is 195 HV0.2. In 0.5M H2SO4solution, the coating has better corrosion resistance than the substrate, which allows the HEAcoating to be used as an anti-corrosion coating in engineering applications.
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