Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy
Ever-harsher service conditions in the future will call for materials with increasing ability to undergo deformation without sustaining damage while retaining high strength. Prime candidates for these conditions are certain high-entropy alloys (HEAs), which have extraordinary work-hardening ability...
| Váldodahkkit: | , , , , , , , , |
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| Materiálatiipa: | Journal article |
| Giella: | English |
| Almmustuhtton: |
American Association for the Advancement of Science
2021
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| _version_ | 1826293737146286080 |
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| author | Zhao, S Li, Z Zhu, C Yang, W Zhang, Z Armstrong, DEJ Grant, PS Ritchie, RO Meyers, MA |
| author_facet | Zhao, S Li, Z Zhu, C Yang, W Zhang, Z Armstrong, DEJ Grant, PS Ritchie, RO Meyers, MA |
| author_sort | Zhao, S |
| collection | OXFORD |
| description | Ever-harsher service conditions in the future will call for materials with increasing ability to undergo deformation without sustaining damage while retaining high strength. Prime candidates for these conditions are certain high-entropy alloys (HEAs), which have extraordinary work-hardening ability and toughness. By subjecting the equiatomic CrMnFeCoNi HEA to severe plastic deformation through swaging followed by either quasi-static compression or dynamic deformation in shear, we observe a dense structure comprising stacking faults, twins, transformation from the face-centered cubic to the hexagonal close-packed structure, and, of particular note, amorphization. The coordinated propagation of stacking faults and twins along {111} planes generates high-deformation regions, which can reorganize into hexagonal packets; when the defect density in these regions reaches a critical level, they generate islands of amorphous material. These regions can have outstanding mechanical properties, which provide additional strengthening and/or toughening mechanisms to enhance the capability of these alloys to withstand extreme loading conditions. |
| first_indexed | 2024-03-07T03:34:46Z |
| format | Journal article |
| id | oxford-uuid:bbe831bd-fa29-49ce-bec9-9c65d140782e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:34:46Z |
| publishDate | 2021 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | oxford-uuid:bbe831bd-fa29-49ce-bec9-9c65d140782e2022-03-27T05:20:36ZAmorphization in extreme deformation of the CrMnFeCoNi high-entropy alloyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bbe831bd-fa29-49ce-bec9-9c65d140782eEnglishSymplectic ElementsAmerican Association for the Advancement of Science2021Zhao, SLi, ZZhu, CYang, WZhang, ZArmstrong, DEJGrant, PSRitchie, ROMeyers, MAEver-harsher service conditions in the future will call for materials with increasing ability to undergo deformation without sustaining damage while retaining high strength. Prime candidates for these conditions are certain high-entropy alloys (HEAs), which have extraordinary work-hardening ability and toughness. By subjecting the equiatomic CrMnFeCoNi HEA to severe plastic deformation through swaging followed by either quasi-static compression or dynamic deformation in shear, we observe a dense structure comprising stacking faults, twins, transformation from the face-centered cubic to the hexagonal close-packed structure, and, of particular note, amorphization. The coordinated propagation of stacking faults and twins along {111} planes generates high-deformation regions, which can reorganize into hexagonal packets; when the defect density in these regions reaches a critical level, they generate islands of amorphous material. These regions can have outstanding mechanical properties, which provide additional strengthening and/or toughening mechanisms to enhance the capability of these alloys to withstand extreme loading conditions. |
| spellingShingle | Zhao, S Li, Z Zhu, C Yang, W Zhang, Z Armstrong, DEJ Grant, PS Ritchie, RO Meyers, MA Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title | Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title_full | Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title_fullStr | Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title_full_unstemmed | Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title_short | Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy |
| title_sort | amorphization in extreme deformation of the crmnfeconi high entropy alloy |
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