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Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement

Title
Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement
Author
장재일
Keywords
High-entropy alloy; Hydrogen embrittlement; Tensile test; Nanoindentation; Thermal desorption spectroscopy
Issue Date
2017-07
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v. 135, page. 54-58
Abstract
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. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S1359646217301549?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114970
ISSN
1359-6462
DOI
10.1016/j.scriptamat.2017.03.029
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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