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Indexed by:Journal Papers

Date of Publication:2015-10-01

Journal:JOURNAL OF THERMAL SPRAY TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:24

Issue:7

Page Number:1333-1340

ISSN No.:1059-9630

Key Words:high-entropy alloy; laser cladding; microstructures; wear resistance

Abstract:A series of Al2CrFeNiMo (x) (x = 0 to 2.0 at.%) high-entropy alloys coatings was synthesized on stainless steel by laser cladding. The effect of Mo content on the microstructures and mechanical properties of Al2CrFeNiMo (x) coatings was studied. The results show that the laser clad layer consists of the cladding zone, bonding zone, and heat-affected zone. The Al2CrFeNiMo (x) coatings are composed of two simple body-center cubic phases and the cladding zone is mainly composed of equiaxed grains. When the content of Mo reaches 2 at.%, a eutectic structure is found in the interdendritic regions. The surface microhardness of the Al2CrFeNiMo2 coating is 678 HV, which is about three times higher than that of the substrate (243 HV). Compared with stainless steel, the wear resistance of the coatings has been improved greatly. The wear mass loss of the Al2CrFeNiMo alloy is 9.8 mg, which is much less than that of the substrate (18.9 mg) and its wear scar width is the lowest among the Al2CrFeNiMo (x) coatings, indicating that the wear resistance of the Al2CrFeNiMo is the best.