CoCrFeMnNi高熵合金与304和IN718合金的氢脆性能比较

IF 2.6 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals Pub Date : 2022-06-10 DOI:10.3390/met12060998

Zheng Feng, Xinfeng Li, Xiaolong Song, Tang Gu, Yong Zhang

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引用次数: 4

摘要

通过电化学氢预充、慢应变速率拉伸试验和断口分析，研究并比较了CoCrFeMnNi高熵合金（HEA）、304不锈钢（304SS）和IN718合金的氢脆行为。结果表明，当合金在1.79 mA cm−2下充电24小时和48小时时，HEA表现出最大的HE电阻，其次是304SS，然后是IN718合金。在304SS和IN718合金中观察到氢诱导的延展性降低，而氢影响的HEA断裂应变取决于充氢时间。在较短的充氢时间（24小时）下，对HE的电阻提高，但在较长的充电时间（48小时）下降低。这归因于氢增强孪晶形成和HEDE（氢增强脱粘）之间的竞争机制。

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Hydrogen Embrittlement of CoCrFeMnNi High-Entropy Alloy Compared with 304 and IN718 Alloys

The hydrogen embrittlement (HE) behaviors of a CoCrFeMnNi high-entropy alloy (HEA), 304 stainless steel (304SS) and IN718 alloys were studied and compared via electrochemical hydrogen pre-charging, slow strain rate tensile tests, and fracture surface analysis. The results demonstrate that the HEA exhibited the greatest HE-resistance, followed by 304SS and then IN718 alloy, when the alloys were charged at 1.79 mA cm−2 for 24 h and 48 h, and 179 mA cm−2 for 2 h. Hydrogen-induced reduction in ductility was observed for 304SS and IN718 alloys, whereas the hydrogen-affected fracture strain of the HEA was dependent on the hydrogen charging time. The resistance to HE was improved at a short hydrogen charging time (24 h), but reduced at a long charging time (48 h). This is attributed to the competing mechanisms between hydrogen-enhanced twin formation and HEDE (hydrogen-enhanced decohesion).

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来源期刊

Metals MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

4.90

自引率

13.80%

发文量

1832

审稿时长

1.5 months

期刊介绍： Metals (ISSN 2075-4701) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (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 the length of the papers. The full experimental details must be provided so that the results can be reproduced. Metals provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of metals.