Size-dependent pitting corrosion behavior for L12-strengthened high-entropy alloys

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-01-03 DOI:10.1016/j.corsci.2025.112679
Tianrun Li , Debin Wang , Jingping Cui , Ning Li , Suode Zhang , Jianqiang Wang
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Abstract

This work thoroughly investigated the effects of the L12 size upon the corrosion behavior for L12-strengthened HEAs. Compared with the single-phase homogenized HEA, HEAs strengthened by small-sized L12 exhibited higher pitting potential (Epit). Nevertheless, with the L12 coarsening, Epit decreases markedly. The exceptional corrosion behavior for small-sized L12-strengthened HEAs was attributed to the rapid repassivation of the remaining FCC matrix after the complete dissolution of L12, forming the uniform and Cr-enriched films. The deteriorated corrosion resistance induced by the larger L12 was ascribed to heterogeneous films due to the incomplete dissolution of L12 and the reduced pitting growth resistance.
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l12强化高熵合金的点蚀行为
本文研究了L12尺寸对L12增强HEAs腐蚀行为的影响。与单相均质HEA相比,小尺寸L12增强的HEAs具有更高的点蚀电位(Epit)。随着L12的粗化,Epit显著降低。小尺寸L12增强HEAs的特殊腐蚀行为归因于L12完全溶解后剩余FCC基体的快速再钝化,形成均匀的富cr膜。由于L12的不完全溶解和抗点蚀生长能力的降低,使得L12的耐蚀性能下降。
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来源期刊
Corrosion Science
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.
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