Microstructure and Properties of Laser-cladded Fe 50 Mn 30 Co 10 Cr 10 High Entropy Alloy Coatings

Fe 50 Mn 30 Co 10 Cr 10 high-entropy alloys were prepared by laser cladding technology. The microstructure and phase structure of the cladding layer were analyzed. The effects of laser cladding parameters on mechanical property of the cladding layer were studied. The results show that, the Fe 50 Mn 30 Co 10 Cr 10 high entropy alloy cladding layer is composed of FCC structure and HCP structure, BCC structure was also observed in the layer. There are fine equiaxed grains at the top of the cladding layer while columnar grains near the fusion zone. The maximum hardness of cladding layer is 292.9 HV under the laser cladding parameter of 200 W and 5 mm/s. The maximum tensile strength of the substrate with cladding layer is 692.4 MPa, and the maximum elongation is 21.3%. The fracture mode of cladding layer is ductile fracture. Adhesive wear and abrasive wear are both observed at surface of the cladding layer after wear testing. The best wear resistance is obtained at cladding parameter of 200 W, 7 mm/s with the weight loss of 0.0215g and friction coefficient of 0.6294. The results provide a certain support for the preparation process and microstructure, properties analysis of Fe 50 Mn 30 Co 10 Cr 10 high entropy alloy.