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Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement

Zhao, Yakai and Lee, Dong-Hyun and Seok, Moo-Young and Lee, Jung-A and Phaniraj, MP and Suh, Jin-Yoo and Ha, Heon-Young and Kim, Ju-Young and Ramamurty, Upadrasta and Jang, Jae-il (2017) Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement. In: Scripta Materialia, 135 . pp. 54-58. ISSN 13596462

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Official URL: https://doi.org/10.1016/j.scriptamat.2017.03.029


The influence of hydrogen on the mechanical behavior of the CoCrFeMnNi high-entropy alloy (HEA) was examined through tensile and nanoindentation experiments on specimens hydrogenated via gaseous and electrochemical methods. Results show that the HEA's resistance to gaseous hydrogen embrittlement is better than that of two representative austenitic stainless steels, in spite of the fact that it absorbs a larger amount of hydrogen than the two steels. Reasons for this were discussed in terms of hydrogen-enhanced localized plasticity mechanism and the critical amount of hydrogen required for it. These were further substantiated by additional experiments on electrochemically charged specimens.

Item Type: Journal Article
Publication: Scripta Materialia
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to the Elsevier Ltd.
Keywords: High-entropy alloy; Hydrogen embrittlement; Nanoindentation; Tensile test; Thermal desorption spectroscopy
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 31 May 2022 05:28
Last Modified: 31 May 2022 05:28
URI: https://eprints.iisc.ac.in/id/eprint/72897

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