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FeNiCrCoCuxMo High Entropy Alloy (HEA) Coatings Fabricated by Laser Cladding
X. Xiong, Y. Zhu, Y. Shi, G.J. Cai, K. Chen and F. Zhou

In order to obtain excellent coatings the FeNiCrCoCuxMo (x=0, 0.3, 0.6) high-entropy alloy (HEA) coatings have been successfully fabricated by rectangular spot laser cladding technique on Q235 carbon steel substrates. The phase structures, microstructure, hardness, wear resistance and corrosion resistance of the laser clad HEA coatings were investigated. The phase of the coatings all consists of face-centre cubic (FCC) solid solution and the microstructures were all dendritic. The hardness of the coatings is in decline with the addition of Cu content, but all higher than that of the Q235 carbon steel substrate. The coatings exhibited prominent wear resistance with less wear volume than the substrate. Also, the coatings possessed excellent corrosion resistance in the dilute sulfuric acid, with the FeNiCrCoCu0.3Mo coating proving to be the optimal consistency.

Keywords: Fibre laser, FeNiCrCoCuxMo, Q235 carbon steel, high-entropy alloy (HEA), laser cladding, phase, microstructure, microhardness; corrosion resistance

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