Microstructure and Wear Resistance of FeCuNiTiAl High-Entropy Alloy Coating on Ti6Al4V Substrate Fabricated by Laser Metal Deposition

In order to improve the hardness and wear resistance of titanium alloys, an equimolar ratio high-entropy alloy (HEA) FeCuNiTiAl coating was fabricated on surface Ti6Al4V by means laser metal deposition for first time. The microstructure composition HEA transition zone were observed scanning electron microscopy (SEM) energy dispersive spectrometer (EDS). results show that have suitable metallurgical bonding, no defects, such as cracks, are found at interface. is between 450 500 HV0.5, which about 1.5 times substrate. Wear tests rate 0.89 × 10?5 mm3/(N·m), while reaches 53.97 substrate increased 60 coating. mechanism mainly abrasive wear, adhesive accompanied slight oxidation wear.