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Influence of Hydrogen Absorption on Stacking Fault of Energy of a Face-Centered Cubic High Entropy Alloy
- Authors
- Kim, Han-Jin; Cho, Min-Kyung; Kim, Gyeungho; Lee, Seung-Yong; Jo, Min-Gu; Kim, Hayoung; Suh, Jin-Yoo; Lee, Joonho
- Issue Date
- 11월-2022
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- High entropy alloy; Hydrogen embrittlement; Stacking fault energy; Weak-beam dark-field
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.28, no.11, pp.2637 - 2645
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 28
- Number
- 11
- Start Page
- 2637
- End Page
- 2645
- ISSN
- 1598-9623
- Abstract
- Hydrogen-induced variation of stacking fault energy (SFE) of a CrMnFeCoNi high-entropy alloy (HEA) was quantitatively evaluated by transmission electron microscopy (TEM) using weak-beam dark-field (WBDF) technique. Width of Shockley partial dislocations turned out to increase after hydrogen absorption, which indicates that hydrogen decreases the SFE of the alloy: from 31.5 +/- 3.5 to 22.5 +/- 2.5 mJm(-2) by introduction of hydrogen into the lattice with approximate concentration of 115 wppm. This report provides the first direct observation of stacking faults under the influence of hydrogen in a face-centered cubic metallic structure.
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