Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen
© 2018 The Authors. We investigated hydrogen embrittlement in Fe20Mn20Ni20Cr20Co and Fe30Mn10Cr10Co (at.%) alloys pre-charged with 100 MPa hydrogen gas by tensile testing at three initial strain rates of 10 -4 , 10 -3 , and 10 -2 s -1 at ambient temperature. The alloys are classified as stable and...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/135071 |
| _version_ | 1826202616825118720 |
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| author | Ichii, Kenshiro Koyama, Motomichi Tasan, Cemal Cem Tsuzaki, Kaneaki |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Ichii, Kenshiro Koyama, Motomichi Tasan, Cemal Cem Tsuzaki, Kaneaki |
| author_sort | Ichii, Kenshiro |
| collection | MIT |
| description | © 2018 The Authors. We investigated hydrogen embrittlement in Fe20Mn20Ni20Cr20Co and Fe30Mn10Cr10Co (at.%) alloys pre-charged with 100 MPa hydrogen gas by tensile testing at three initial strain rates of 10 -4 , 10 -3 , and 10 -2 s -1 at ambient temperature. The alloys are classified as stable and metastable austenite-based high-entropy alloys (HEAs), respectively. Both HEAs showed the characteristic hydrogen-induced degradation of tensile ductility. Electron backscatter diffraction analysis indicated that the reduction in ductility by hydrogen pre-charging was associated with localized plasticity-assisted intergranular crack initiation. It should be noted as an important finding that hydrogen-assisted cracking of the metastable HEA occurred not through a brittle mechanism but through localized plastic deformation in both the austenite and ϵ-martensite phases. |
| first_indexed | 2024-09-23T12:11:21Z |
| format | Article |
| id | mit-1721.1/135071 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:11:21Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1350712023-02-23T15:59:16Z Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen Ichii, Kenshiro Koyama, Motomichi Tasan, Cemal Cem Tsuzaki, Kaneaki Massachusetts Institute of Technology. Department of Materials Science and Engineering © 2018 The Authors. We investigated hydrogen embrittlement in Fe20Mn20Ni20Cr20Co and Fe30Mn10Cr10Co (at.%) alloys pre-charged with 100 MPa hydrogen gas by tensile testing at three initial strain rates of 10 -4 , 10 -3 , and 10 -2 s -1 at ambient temperature. The alloys are classified as stable and metastable austenite-based high-entropy alloys (HEAs), respectively. Both HEAs showed the characteristic hydrogen-induced degradation of tensile ductility. Electron backscatter diffraction analysis indicated that the reduction in ductility by hydrogen pre-charging was associated with localized plasticity-assisted intergranular crack initiation. It should be noted as an important finding that hydrogen-assisted cracking of the metastable HEA occurred not through a brittle mechanism but through localized plastic deformation in both the austenite and ϵ-martensite phases. 2021-10-27T20:10:36Z 2021-10-27T20:10:36Z 2018 2019-09-24T15:13:25Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/135071 en 10.1016/J.PROSTR.2018.12.119 Procedia Structural Integrity Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Elsevier |
| spellingShingle | Ichii, Kenshiro Koyama, Motomichi Tasan, Cemal Cem Tsuzaki, Kaneaki Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title | Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title_full | Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title_fullStr | Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title_full_unstemmed | Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title_short | Localized Plasticity and Associated Cracking in Stable and Metastable High-Entropy Alloys Pre-Charged with Hydrogen |
| title_sort | localized plasticity and associated cracking in stable and metastable high entropy alloys pre charged with hydrogen |
| url | https://hdl.handle.net/1721.1/135071 |
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