Friction–wear behaviors and microstructure of AlTiVCrNb lightweight refractory high-entropy alloy coating prepared by laser cladding on Ti–6Al–4V substrate

Xuanhong Hao; Hongxi Liu; Xiaowei Zhang; Lin Chen; Yueyi Wang; Chen Yang; Yaxia Liu

Journal of Materials Research and Technology (Mar 2024)

Friction–wear behaviors and microstructure of AlTiVCrNb lightweight refractory high-entropy alloy coating prepared by laser cladding on Ti–6Al–4V substrate

Xuanhong Hao,
Hongxi Liu,
Xiaowei Zhang,
Lin Chen,
Yueyi Wang,
Chen Yang,
Yaxia Liu

Affiliations

Xuanhong Hao: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Hongxi Liu: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.
Xiaowei Zhang: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.
Lin Chen: School of Materials Science and Engineering, Baise University, Baise, 533000, China; College of Ecological Aluminum Industry, Baise University, Baise, 533000, China; Engineering Research Center of Advanced Aluminium Matrix Materials of Guangxi Province, Baise, 533000, China
Yueyi Wang: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Chen Yang: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Yaxia Liu: The Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

Journal volume & issue: Vol. 29
pp. 1 – 11

Abstract

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To enhance the friction and wear properties of Ti–6Al–4V, the AlTiVCrNb lightweight refractory high entropy alloy coating was applied to a Ti–6Al–4V substrate by laser cladding. The microstructure was investigated through scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. The results demonstrate that the coatings are metallurgically bonded to the Ti–6Al–4V substrate, and the microstructure of the AlTiVCrNb coatings with high Ti content comprises disordered BCC phases, laves reinforced phases, and diffusely distributed Ti2AlNb nanophases. The microhardness of the coating measures 548.54 HV0.1, surpassing that of the Ti–6Al–4V substrate by 1.57 times. The wear resistance of the AlTiVCrNb HEA coating is 1.58 times higher than that of the Ti–6Al–4V alloy under a 20 N load, thereby effectively improving the wear resistance of the Ti6Al4V alloy. The main wear mechanisms of AlTiVCrNb high-entropy alloy coatings are oxidative and adhesive wear.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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