激光熔覆CoCrFeNi多主元素合金涂层的组织与磨损性能

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-05-28 DOI:10.1016/j.intermet.2025.108829

Zhiyuan Wang , Mengjiao Xia , Chuilei Kong

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引用次数: 0

摘要

激光熔覆法制备CoCrFeNi多主元素合金（MPEA）涂层具有独特的性能，近年来引起了人们的广泛关注和研究。然而，LC过程中各种工艺参数对涂层影响的研究很少。在激光功率650 ~ 800 W，给粉速度9 ~ 13g⋅min−1的工艺范围内，制备了CoCrFeNi MPEA LC涂层。利用纳米压痕和磨损试验对涂层的晶粒结构和微观形貌进行了表征，并对涂层的磨损机理进行了分析。结果表明，制备的MPEA涂层质量好，且FCC相单一。当激光功率增加到800w时，过量的激光功率使部分Ti原子进入涂层，形成富Ti相。富钛相硬度高，但在磨损试验中容易生成脆性TiO2，不利于耐磨性能的提高。涂层承担了载荷，提高了基体的耐磨性。通过本研究，可以进一步拓展高硬度MEA涂层的应用领域。

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Microstructure and wear performance of CoCrFeNi multi-principal element alloy coating deposited using laser cladding

CoCrFeNi multi-principal element alloy (MPEA) coatings prepared using laser cladding (LC) with unique properties have aroused great interest in recent years and have been widely studied. However, there is little research on the influence of various process parameters during the LC process on the coating. In this study, CoCrFeNi MPEA LC coatings were prepared within the process range of laser power at 650–800 W and powder feeding speed 9–13g⋅min⁻¹. The grain structures and microscopic morphologies of coatings were characterized, and the wear mechanisms were analyzed using the nano-indentation and wear tests. The results show that the prepared MPEA coatings are of good quality and contain a single FCC phase. When the laser power increases to 800 W, excessive laser power causes some Ti atoms to enter the coating to form a Ti-rich phase. The titanium-rich phase has high hardness, but it is easy to generate brittle TiO₂ in the wear test, which is not conducive to the improvement of wear performance. The coatings carried the load and improved the wear resistance of the substrate. Through this study, the application field of high-hardness MEA coating can be further expanded.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.