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

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

doi:10.1016/j.corsci.2023.111023

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

Chung, Duk Hyun;
Kim, Young Kyun;
Kim, Yong Keun;
Song, Sang Yoon;
Kwon, Heoun Jun;
... Sohn, Seok Su;
외 1명

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초록

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.

키워드

Medium entropy alloys (MEAs); Hydrogen embrittlement; Stacking fault energy; Hydrogen trapping sites; Dislocation cell walls; STACKING-FAULT ENERGY; STRESS-CORROSION; GRAIN; BEHAVIOR; STEELS; MICROSTRUCTURES; BOUNDARIES; FRACTURE; CRACKING; CARBON

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

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

DOI: 10.1016/j.corsci.2023.111023

발행일: 2023-05-01

유형: Article

저널명: Corrosion Science

권: 215