Effect of Laser Multiple Remelting on the Geometric Parameters and Component Distribution of CrMnFeCoNi High-Entropy Alloys Coatings Fabricated on Al Alloy by Laser Cladding

IF 1.6 4区材料科学 Q2 Materials Science Transactions of The Indian Institute of Metals Pub Date : 2024-08-12 DOI:10.1007/s12666-024-03414-9

Chao Chen, Xinyue Cong, Jing Lv, Baosong Guo, Huijing Zhang

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Abstract

In this work, CrMnFeCoNi high-entropy alloy coating was successfully prepared on the surface of aluminum alloy by laser cladding. The relationship between the geometrical morphology of the coating cross section and laser process parameters was systematically studied. The influence of line energy and the number of remelting on the morphology of the coating cross section was mainly discussed, and the uniformity of coating elements distribution was regulated by multiple remelting. The coating cross-sectional dimensions, element distribution and hardness values were measured by stereomicroscope, energy-dispersive spectrometer and microhardness tester. The results show that the cladding height of CrMnFeCoNi high-entropy alloy coating increases first and then decreases with the increase of line energy, but the value changes slightly. The cladding width and cladding depth gradually increase with the increase of line energy and remelting times. When the coating is remelted 2 times, there is an incompletely melted island-like CrMnFeCoNi high-entropy alloy powder in the upper left corner of the coating. When remelting 3 times, there is no incompletely melted high-entropy alloy aggregate, and the uniformity of coating is better than that when remelting 2 times. The uniformity of coating composition is the best after 4 remelts, and the hardness of coating reaches 459.67HV_0.2 when the line energy is 0.67 J/mm for 4 remelts.

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激光多重重熔对通过激光熔覆在铝合金上制造的 CrMnFeCoNi 高熵合金涂层的几何参数和成分分布的影响

本研究采用激光熔覆技术在铝合金表面成功制备了铬锰铁钴镍高熵合金涂层。系统研究了涂层截面几何形貌与激光工艺参数之间的关系。主要讨论了线能量和重熔次数对涂层截面形貌的影响，并通过多次重熔调节了涂层元素分布的均匀性。利用体视显微镜、能量色散光谱仪和显微硬度计测量了涂层截面尺寸、元素分布和硬度值。结果表明，随着线能量的增加，CrMnFeCoNi 高熵合金镀层的覆层高度先增大后减小，但数值变化不大。熔覆宽度和熔覆深度随着线能量和重熔次数的增加而逐渐增大。重熔 2 次时，涂层左上角出现未完全熔化的岛状 CrMnFeCoNi 高熵合金粉末。重熔 3 次时，没有未完全熔化的高熵合金集合体，涂层的均匀性优于重熔 2 次。重熔 4 次后，涂层成分的均匀性最好，重熔 4 次的线能量为 0.67 J/mm 时，涂层硬度达到 459.67HV0.2。

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Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

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期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.