Cavitation erosion behavior of Fe50Mn30Co10Cr10 high entropy alloy coatings prepared by laser melting deposition

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI:10.1016/S1003-6326(25)66768-9

Guo-cheng LIU , Jian-jiang LI , Ning HU , Qi-yong TU , Ze-qi HU , Lin HUA

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Abstract

In order to reveal the cavitation erosion mechanisms of Fe₅₀Mn₃₀Co₁₀Cr₁₀ coating prepared by laser melting deposition (LMD) technique, the phase composition evolution, microstructure, microhardness, cavitation erosion resistance and failure mechanisms were investigated. The results demonstrate that the amount of martensite HCP ε phase of the coating surface increased by a factor of 2.43, and the microhardness increased from HV 270 to HV 410 after 20 h of cavitation erosion test in distilled water. The cumulative volume loss of the coating was approximately 55% less than that of AlCoCr_xCuFe (x=2.0), and the cumulative mean depth of erosion (MDE) was 9% that of FeCoCrAlNiTi_x (x=2.0). The surface strength and plasticity of the coating were further strengthened in the process of cavitation erosion due to the back stress strengthening and work hardening mechanism caused by the heterogeneous structure, which effectively improved the cavitation erosion resistance of the coating.

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激光熔化沉积制备Fe50Mn30Co10Cr10高熵合金涂层的空化侵蚀行为

为了揭示激光熔化沉积（LMD）技术制备Fe50Mn30Co10Cr10涂层的空蚀机理，研究了涂层的相组成演变、显微组织、显微硬度、抗空蚀性和失效机理。结果表明：涂层表面的马氏体HCP ε相数量增加了2.43倍，在蒸馏水中空化侵蚀试验20 h后，涂层表面的显微硬度由HV 270提高到HV 410；涂层的累积体积损失比AlCoCrxCuFe （x=2.0）减少约55%，累积平均侵蚀深度（MDE）比FeCoCrAlNiTix （x=2.0）减少9%。由于非均质组织引起的背应力强化和加工硬化机制，涂层在空化侵蚀过程中表面强度和塑性进一步增强，有效提高了涂层的抗空化侵蚀性能。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.