Research on the Performance Regulation of High-entropy Alloy Electron Beam Cladding Layer on Aluminum Alloy Surface

FENG Daochen; XU Jiancheng; LIU Guohao; ZHENG Yifei; ZHENG Wenjian; YANG Jianguo

doi:10.27022/j.issn2097-7697.2026.01.010

Journal of Special Equipment ›› 2026, Vol. 1 ›› Issue (1) : 116-126. DOI: 10.27022/j.issn2097-7697.2026.01.010

Experimental Research

Research on the Performance Regulation of High-entropy Alloy Electron Beam Cladding Layer on Aluminum Alloy Surface

FENG Daochen^1,2, XU Jiancheng¹, LIU Guohao¹, ZHENG Yifei¹, ZHENG Wenjian^1,2, YANG Jianguo^1,2

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Abstract

2219 aluminum alloy exhibits high specific strength and excellent mechanical properties at both high and low temperatures, but its insufficient surface hardness and corrosion resistance limit its application in special equipment fields. This study fabricated an AlCoCrFeNi high-entropy alloy (HEA) electron beam cladding layer on the surface of 2219 aluminum alloy. The effects of welding beam current, scanning speed, and scanning frequency on the microstructure of the cladding layer were systematically investigated. Combined with microstructure characterization and electrochemical corrosion tests, an in-depth analysis was conducted on the mechanism underlying the influence of microstructural evolution on the mechanical properties and corrosion resistance of the cladding layer. The results demonstrate that the optimal cladding parameters are a cladding beam current of 15 mA, a scanning speed of 150 mm/min, and a scanning frequency of 800 Hz. Under these parameters, the diffusion of Al elements from the substrate to the cladding layer is enhanced, while the dilution effect alleviates the constraint stress at the interface, thereby effectively suppressing the formation of cracks in the single-pass cladding layer. Ultimately, the microhardness of the resulting cladding layer stabilizes at approximately 400 HV, and its corrosion resistance is significantly superior to that of the 2219 aluminum alloy base metal (BM) and cladding layers prepared under other parameter combinations.

Key words

Electron beam cladding / AlCoCrFeNi high-entropy alloy / 2219 aluminum alloy / Corrosion resistance / Performance modification

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FENG Daochen, XU Jiancheng, LIU Guohao, ZHENG Yifei, ZHENG Wenjian, YANG Jianguo. Research on the Performance Regulation of High-entropy Alloy Electron Beam Cladding Layer on Aluminum Alloy Surface[J]. Journal of Special Equipment, 2026, 1(1): 116-126. https://doi.org/10.27022/j.issn2097-7697.2026.01.010

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