Influences of hydrogen charging method on the hydrogen distribution and nanomechanical properties of face-centered cubic high-entropy alloy: A comparative study
- Authors
- Zhao, Yakai; Park, Jeong-Min; Lee, Dong-Hyun; Song, Eun Ju; Suh, Jin-Yoo; Ramamurty, Upadrasta; Jang, Jae-il
- Issue Date
- Jul-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- High-entropy alloy; Hydrogen charging method; Hydrogen distribution; Nanoindentation; Thermal desorption spectroscopy
- Citation
- SCRIPTA MATERIALIA, v.168, pp.76 - 80
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCRIPTA MATERIALIA
- Volume
- 168
- Start Page
- 76
- End Page
- 80
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/13386
- DOI
- 10.1016/j.scriptamat.2019.04.025
- ISSN
- 1359-6462
- Abstract
- The influence of charging method on hydrogen (H) distribution and the resultant nanomechanical behavior of CoCrFeMnNi high-entropy alloy was examined and compared with another face-centered cubic structured alloy, an austenitic stainless steel. Through thermal desorption spectroscopy measurement and theoretical analysis, it was revealed that electrochemical (E-) charging induces steep gradient of H concentration near the surface while H was homogenously distributed after gaseous (G-) charging. Nanoindentation results show significant hardening in E-charged alloys while the hardness of G-charged alloys remains invariant. These differences were rationalized in terms of the nature of H distributions induced by different charging methods.
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