Microstructure and Mechanical Properties of TiC/WC-Reinforced AlCoCrFeNi High-Entropy Alloys Prepared by Laser Cladding

IF 2.4 4区材料科学 Q2 CRYSTALLOGRAPHY

Crystals Pub Date : 2024-01-15 DOI:10.3390/cryst14010083

Zhikai Zhu, Wenqing Shi, Jiang Huang

引用次数: 0

Abstract

By employing the technology of laser cladding, AlCoCrFeNi–TiC20−x/WCx high-entropy alloy coatings (where x = 0, 5, 10, 15, and 20 is the mass fraction) were fabricated on 316L stainless steel (316Lss). The effects of changes in different mass fractions on the morphology, phase composition, microstructure, microhardness, and corrosion resistance of the composite coatings were studied. This demonstrates that the addition of TiC and WC powder produces an FCC phase in the original BCC phase, the morphology and size of the coatings from top to bottom undergo some changes with x, and the grain size evolution follows a cooling rate law. The evolution of microhardness and corrosion resistance of the coatings exhibit a trend of increasing first and then decreasing with an increase in x. The coatings exhibited their best microhardness and corrosion resistance when x = 15, and their corrosion resistance and microhardness were much better than those of the substrate.

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激光熔覆法制备的 TiC/WC 增强铝钴铬铁镍高熵合金的显微结构和力学性能

通过采用激光熔覆技术，在 316L 不锈钢（316Lss）上制备了 AlCoCrFeNi-TiC20-x/WCx 高熵合金涂层（其中 x = 0、5、10、15 和 20 为质量分数）。研究了不同质量分数的变化对复合涂层的形态、相组成、微观结构、显微硬度和耐腐蚀性的影响。结果表明，加入 TiC 和 WC 粉后，在原来的 BCC 相中产生了 FCC 相，涂层从上到下的形貌和尺寸随 x 的变化而发生一定的变化，晶粒尺寸的演变遵循冷却速率规律。涂层的显微硬度和耐腐蚀性随 x 的增大呈先增大后减小的趋势。当 x = 15 时，涂层的显微硬度和耐腐蚀性最好，其耐腐蚀性和显微硬度远远优于基体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crystals CRYSTALLOGRAPHYMATERIALS SCIENCE, MULTIDIS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

4.20

自引率

11.10%

发文量

1527

审稿时长

16.12 days

期刊介绍： Crystals (ISSN 2073-4352) is an open access journal that covers all aspects of crystalline material research. Crystals can act as a reference, and as a publication resource, to the community. It publishes reviews, regular research articles, and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Full experimental details must be provided to enable the results to be reproduced. Crystals provides a forum for the advancement of our understanding of the nucleation, growth, processing, and characterization of crystalline materials. Their mechanical, chemical, electronic, magnetic, and optical properties, and their diverse applications, are all considered to be of importance.