Al含量对CoCrFeNiTi<sub>0.5</sub>高熵合金涂层耐冲蚀和耐腐蚀性能的影响

doi:10.11896/cldb.22030061

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Abstract Al_xCoCrFeNiTi_0.5 (x—molar ratio, x=1.0, 1.5, 2.0, 2.5, denoted as Al_x) high-entropy alloy (HEA) coatings were fabricated by laser cladding. The effect of Al content on microstructure, microhardness, erosion wear resistance and corrosion resistance of CoCrFeNiTi_0.5 HEA coatings was studied. The results show the phases of Al_xCoCrFeNiTi_0.5 HEA coatings evolve gradually from simple FCC+BCC mixed disordered solid solution to mixed structure of disordered BCC+ordered BCC. The hardness of the coatings increases significantly with the increase of Al content. Al_1.0 HEA coating follows ductile erosion mode. Al_1.0 HEA coating has good erosion resistance at different impact angles. The erosion wear rate of Al_1.0 HEA coating is only 56.09%, 59.33% and 60% that of 06Cr16Ni5Mo stainless steel at low impact angle (30°), middle impact angle (60°) and high impact angle (90°), respectively. The corrosion resistance of Al_xCoCrFeNiTi_0.5 HEA coatings gradually reduces with the increase of Al content. Proper Al addition can not only improve erosion wear resistance of CoCrFeNiTi_0.5 HEA coating, and the alloy also has good corrosion resistance.

Key words： high-entropy alloy coating microstructure erosion wear resistance corrosion resistance

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TG174.4

Fund:National Natural Science Foundation of China (51875169) and Hohai University College Students’ Innovative Training Program (202110294032).

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	Articles by authors
	ZHAO Jianhua
	JIN Ronghua
	JI Xiulin
	DUAN Tianze
	ZHUANG Shudong
	ZHAO Zhanxi

Cite this article:

ZHAO Jianhua,JIN Ronghua,JI Xiulin, et al. Effect of Al Content on Erosion Wear Resistance and Corrosion Resistance of CoCrFeNiTi_0.5 High-entropy Alloy Coatings[J]. Materials Reports, 2023, 37(17): 22030061-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22030061 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22030061

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