Hydrogen embrittlement and corrosion resistance of NiCoCr-based equimolar face-centered cubic medium-/high-entropy alloys

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-04-01 Epub Date: 2025-01-10 DOI:10.1016/j.corsci.2025.112700
Zihui Guo , Ming Liu , Yuan Ma , Hang Yu , Sirui Jing , Yu Yan
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Abstract

By studying several NiCoCr-based equiatomic medium-/high-entropy alloys (M/HEAs) with single face-centered cubic structures, in this work, we systematically investigated the key factors affecting the hydrogen embrittlement (HE) of these alloys, with particular emphasis on the deformation mechanism, hydrogen adsorption, hydrogen diffusion, and grain boundary chemistry. The FeNiCoCr HEA was significantly less susceptible to HE than the other alloys due to its lowest hydrogen concentration and the presence of Cr segregation. Mn alloying not only deteriorated the HE resistance but also greatly reduced the passivation film resistance in acidic media and chloride solutions.
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nicocr基等摩尔面心立方中/高熵合金的氢脆及耐蚀性
本文通过对几种具有单面心立方结构的nicocr基等原子中/高熵合金(M/HEAs)的研究,系统地探讨了影响合金氢脆的关键因素,重点研究了氢脆的变形机制、氢吸附、氢扩散和晶界化学。由于FeNiCoCr HEA的氢浓度最低,且存在Cr偏析,因此其对HE的敏感性明显低于其他合金。在酸性介质和氯化物溶液中,Mn合金化不仅使其抗HE性能恶化,而且大大降低了钝化膜的耐钝化性能。
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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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