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  Influences of hydrogen charging method on the hydrogen distribution and nanomechanical properties of face-centered cubic high-entropy alloy: A comparative study

Zhao, Y., Park, J.-M., Lee, D.-H., Song, E. J., Suh, J.-Y., Ramamurty, U., et al. (2019). Influences of hydrogen charging method on the hydrogen distribution and nanomechanical properties of face-centered cubic high-entropy alloy: A comparative study. Scripta Materialia, 168, 76-80. doi:10.1016/j.scriptamat.2019.04.025.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-7357-4 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-7358-3
Genre: Journal Article

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 Creators:
Zhao, Yakai1, Author           
Park, Jeong-Min2, Author           
Lee, Dong-Hyun3, Author           
Song, Eun Ju4, Author
Suh, Jin-Yoo5, Author           
Ramamurty, Upadrasta6, Author           
Jang, Jae-il7, Author           
Affiliations:
1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China, ou_persistent22              
2Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, South Korea, ou_persistent22              
3Alloys for Additive Manufacturing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2117289              
4Sandia National Laboratories, Livermore, CA 94550, USA, ou_persistent22              
5High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea, ou_persistent22              
6School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, ou_persistent22              
7Division of Materials Science and Engineering, Hanyang University, Seoul 04763, South Korea, ou_persistent22              

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Free keywords: Chromium alloys; Cobalt alloys; Entropy; Hydrogen; Iron alloys; Manganese alloys; Nanoindentation; Thermal desorption; Thermal desorption spectroscopy, Comparative studies; Face-centered cubic; Hydrogen charging; Hydrogen distribution; Nano-mechanical behaviors; Nanomechanical property; Steep gradients, High-entropy alloys
 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. © 2019 Acta Materialia Inc

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Language(s): eng - English
 Dates: 2019-07-15
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.scriptamat.2019.04.025
 Degree: -

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Title: Scripta Materialia
  Abbreviation : Scripta Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B. V.
Pages: - Volume / Issue: 168 Sequence Number: - Start / End Page: 76 - 80 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506