Research PaperNo Access

MICROSTRUCTURE AND PROPERTIES OF LASER CLADDED TiNiCoCrVSi HIGH ENTROPY ALLOY COATING

College of Intelligent Manufacturing and Control Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, Shandong, P. R. China

Dongying Key Laboratory of Mechanical Surface Engineering and Tribology Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, Shandong, P. R. China

School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, Shandong, P. R. China

E-mail Address: 444079963@qq.com

Corresponding author.

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JINGJIE DAI

School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, Shandong, P. R. China

E-mail Address: 41681704@qq.com

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CAIXIA SUN

College of Intelligent Manufacturing and Control Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, Shandong, P. R. China

Dongying Key Laboratory of Mechanical Surface Engineering and Tribology Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, Shandong, P. R. China

School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, Shandong, P. R. China

E-mail Address: 454119511@qq.com

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, and

SHOUYING LI

School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, Shandong, P. R. China

E-mail Address: 43841409@qq.com

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https://doi.org/10.1142/S0218625X24500100Cited by:0 (Source: Crossref)

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.

Keywords:

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