Hydrogen embrittlement micromechanisms and direct observations of hydrogen transportation by dislocations during deformation in a carbon-doped medium entropy alloy
SCIE
SCOPUS
- Title
- Hydrogen embrittlement micromechanisms and direct observations of hydrogen transportation by dislocations during deformation in a carbon-doped medium entropy alloy
- Authors
- Kim, Dong-Han; Moallemi, Mohammad; Kim, Kyung-Shik; Kim, Sung-Joon
- Date Issued
- 2022-09
- Publisher
- Elsevier Editora Ltda
- Abstract
- The hydrogen embrittlement micromechanisms and the effect of carbon interstitial on hydrogen distribution were characterized in Fe40Mn40Ni10Cr10 and Fe38Mn41Ni10Cr10C1 medium entropy alloy. Ex-situ microstructural observations revealed that the segregation of carbon on grain boundaries suppresses hydrogen from being trapped in the grain boundaries for carbon-doped alloy before deformation. However, the distribution of hydrogen was similar for both alloys after plastic strain so that the grain boundaries trapped a large fraction of hydrogen during deformation. The fully intergranular fracture mode in the hydrogen affected area of both alloys was explained by the synergy of grain boundary-dislocation reactions and hydrogen-enhanced grain boundary decohesion effects.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/116016
- DOI
- 10.1016/j.jmrt.2022.07.061
- ISSN
- 2238-7854
- Article Type
- Article
- Citation
- Journal of Materials Research and Technology, vol. 20, page. 18 - 25, 2022-09
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- There are no files associated with this item.
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