article · Engineering Research Express
Abstract This study investigates the microstructure, phase composition, hardness and tribological behaviour of an equiatomic AlTiSiCrCo high-entropy alloy (HEA) coating fabricated on Ti6Al4V substrate using laser cladding. X-ray diffraction analysis revealed that the HEA coating exhibited a body-centred cubic (BCC) matrix with intermetallic precipitates of Al 13 Co 4 , AlSi 3 Ti 2 and Cr 2 Ti. The microhardness improved from 345 HV (Ti6Al4V) to 705 HV (AlTiSiCrCo HEA coating), representing a 104% increase. Under dry sliding wear conditions (10 N load, Al 2 O 3 counter-body, 7.50 cm s −1 sliding speed), the wear rate was reduced by 70% compared to uncoated Ti6Al4versus The enhanced properties are attributed to both the dispersion of hard intermetallic phases within the BCC matrix and the strong metallurgical bonding achieved during laser cladding.
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DOI: 10.1088/2631-8695/ae5020
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