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- Title
MICROSTRUCTURE AND PROPERTIES OF LASER CLADDED TiNiCoCrVSi HIGH ENTROPY ALLOY COATING.
- Authors
ZHANG, HONGXIA; DAI, JINGJIE; SUN, CAIXIA; LI, SHOUYING
- Abstract
A TiNiCoCrVSi high entropy alloy (HEA) coating was prepared on Ti–6Al–4V alloy by laser cladding. Then, the microstructure, phase composition, hardness, wear resistance and high-temperature oxidation resistance of the prepared coatings were investigated. The wear behavior of the TiNiCoCrVSi coating against a Si3N4 ball was evaluated under dry sliding conditions. The high-temperature oxidation resistance was tested at 800∘C. The results show that the phase structure of the TiNiCoCrVSi coating was mainly composed of a body-centered cubic (BCC) (Ni,Co)Ti2 and (Ti,V)5Si3. The TiNiCoCrVSi coating has a high hardness, and the highest surface hardness was 1357 HV. The wear volume of the coating was 1/7 of that of Ti–6Al–4V. The wear mechanism was abrasive wear and oxidative wear. The TiNiCoCrVSi coating exhibited good high-temperature oxidation resistance at 800∘C. A dense oxide film (TiO2, Cr2O3 and NiCr2O4) was formed on the surface of the coating. The dense oxide film prevented oxidation. The high-temperature oxidation resistance of the coating was 1/12 of that of the substrate.
- Subjects
BODY centered cubic structure; FRETTING corrosion; SURFACE coatings; OXIDE coating; ENTROPY; SLIDING wear; TITANIUM alloys
- Publication
Surface Review & Letters, 2024, Vol 31, Issue 2, p1
- ISSN
0218-625X
- Publication type
Article
- DOI
10.1142/S0218625X24500100