激光熔覆MoNbTaVW难熔高熵合金涂层微动磨损性能

doi:10.11896/cldb.22100174

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Abstract The fretting wear properties and fretting wear mechanism of MoNbTaVW refractory high-entropy alloy coatings prepared by laser cladding were studied under different loads (10 N, 20 N, 30 N), different fretting amplitances (50 μm, 150 μm, 250 μm) and different cycles (5 000, 10 000, 15 000). The results show that the prepared MoNbTaVW refractory high-entropy alloy coating is composed of Fe₇Ta₃-type HCP solid solution phase, FCC solid solution phase and (Fe, Ni) matrix phase, where the FCC phase is unmelted high-entropy alloy powder. According to the range analysis of orthogonal test, the effect of fretting amplitude on the wear volume is the largest, followed by the effect of load, and the effect of cycle number on the wear volume is the least. The wear volume of MoNbTaVW refractory high-entropy alloy coating reaches the maximum under the fretting wear conditions of 15 000 times, 20 N and 250 μm. The effect of load on the friction coefficient is the largest, followed by the amplitude of fretting, and the number of cycles has the smallest effect on the friction coefficient. The friction coefficient of MoNbTaVW refractory high-entropy alloy coating reaches the maximum value under the fretting wear conditions of 10 000 times, 30 N and 150 μm. The fretting wear mechanism of MoNbTaVW refractory high-entropy alloy coating is mainly oxidation wear and adhesive wear. The wear debris generated by fretting wear is mainly Ta- and W-oxides.

Key words： refractory high-entropy alloy fretting wear tribology performance orthogonal test

Published: 10 April 2024 Online: 2024-04-11

CLC number:

TB31

Fund:National Natural Science Foundation of China (51905524,52005113) and Guangdong Academy of Science Projects(2022GDASZH-2022010107).

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	Articles by authors
	DONG Yinghui
	CHEN Feihuan
	CAI Zhaobing
	LIN Guangpei
	LU Bingwen
	ZHANG Po
	GU Le

Cite this article:

DONG Yinghui,CHEN Feihuan,CAI Zhaobing, et al. Fretting Wear Properties of Laser-cladded MoNbTaVW Refractory High-entropy Alloy Coatings[J]. Materials Reports, 2024, 38(7): 22100174-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22100174 OR http://www.mater-rep.com/EN/Y2024/V38/I7/22100174

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