Corrosion behavior and corrosion resistance mechanism of a multi-level heterogeneous lamellar structure eutectic high entropy alloy

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-10 DOI:10.1016/j.corsci.2025.113172

Hao Wu , Jun Xie , Huaiyu Yang , Qi Li , Hongyu Chai , Fengjiang Zhang , Zhaokuang Chu , Jingjing Liang , Guichen Hou , Jinguo Li , Yizhou Zhou , Xiaofeng Sun

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引用次数: 0

Abstract

The heterostructure design has been extensively utilized in eutectic high entropy alloys (EHEAs) to further improve their comprehensive mechanical properties. Nevertheless, the impact of heterostructure construction on the corrosion resistance of EHEAs remains unclear. In this study, the corrosion behavior of a multi-level heterogeneous lamellar structure (MHLS) EHEA was studied, and the effect of heterostructure design on the corrosion mechanism of the alloy was clarified. The results showed that the MHLS EHEA exhibited significantly improved corrosion resistance in 3.5 wt% NaCl solution compared to the as-cast EHEA. The enhanced performance was attributed to a more compact, chemically stable passive film with higher concentrations of corrosion-resistant elements and higher content of corrosion resistant oxides. These attributes arise from the numerous structural defects and the precipitation of fine FeCr-rich FCC phases within the B2 lamellae. The findings of the current work will provide a theoretical basis for the development and design of EHEAs with excellent strength-ductility matching ability and superior corrosion resistance.

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多层非均相层状共晶高熵合金的腐蚀行为及耐蚀机理

异质结构设计在共晶高熵合金（EHEAs）中得到广泛应用，以进一步提高其综合力学性能。然而，异质结构对EHEAs耐蚀性的影响尚不清楚。研究了多层非均相层状结构（MHLS） EHEA的腐蚀行为，阐明了异质结构设计对合金腐蚀机理的影响。结果表明，与铸态EHEA相比，MHLS EHEA在3.5 wt% NaCl溶液中的耐蚀性显著提高。增强的性能归因于更致密、化学稳定的钝化膜，具有更高浓度的耐腐蚀元素和更高含量的耐腐蚀氧化物。这些特性是由大量的结构缺陷和在B2片层中析出的富含fecr的精细FCC相引起的。研究结果将为开发和设计具有良好强度-延性匹配能力和耐腐蚀性的EHEAs材料提供理论依据。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.