中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 12 December 2025 |
（1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China;
3. National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China;
4. School of Electromechanical Engineering, Chongqing College of Electronic Engineering, Chongqing 401331, China;
5. Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia）
Abstract:In order to improve the surface properties of titanium alloys, a novel TiFeNiCuV high-entropy alloy (HEA) coating was prepared on a Ti-6Al-4V (TC4) substrate via laser cladding under different laser powers. The microstructure, microhardness, and friction wear properties of the coatings were systematically investigated. The results showed that at laser powers of 1200 and 2000 W, the microstructure of the coatings exhibited a core–shell dendritic structure. At 2800 W, the coatings displayed a daisy-like eutectic structure. The average hardness of the coatings reached HV 692.281 owing to solid-solution and fine-grain strengthening. Wear mechanisms of the coatings at room temperature primarily involved fatigue and slight oxidation wear. The total volume loss of the coatings was 4.22×10-3 mm3, which was 14.47% that of the TC4, indicating excellent wear resistance.
Key words: high-entropy alloy coating; laser cladding; phase evolution; tribological behaviour
