Enhancing hydrogen embrittlement resistance of medium entropy alloys by forming dislocation cell walls

Duk Hyun Chung, Young Kyun Kim, Yong Keun Kim, Sang Yoon Song, Heoun Jun Kwon, Seok Su Sohn, Young Sang Na

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Hydrogen embrittlement is a complex phenomenon resulting in severe deterioration of ductility or load-bearing capacity of structural metals due to the presence of hydrogen atoms. In order to discover hydrogen-tolerant metals, in this work, we introduce two novel face-centered-cubic phase medium entropy alloys (MEAs) (Cr12Ni12MnxFe76−x, x = 24 and 16). Interestingly, The Cr12Ni12Mn24Fe52 alloy showed high resistance to hydrogen embrittlement at ambient temperature, while exhibiting an increase in strength and ductility. Through experimental assessment, we demonstrate that the stacking fault energy and the resultant dislocation structures enable our MEA to achieve hydrogen-compatible characteristics.

Original languageEnglish
Article number111023
JournalCorrosion Science
Volume215
DOIs
Publication statusPublished - 2023 May 1

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Dislocation cell walls
  • Hydrogen embrittlement
  • Hydrogen trapping sites
  • Medium entropy alloys (MEAs)
  • Stacking fault energy

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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