Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy
Twinning has been found to be a dominate mechanism in the γ′ precipitate strengthened Ni-based superalloys during service at intermediate temperatures. Here, high-resolution transmission electron microscopy and atomistic simulations have been combined to show that the twin nucleation process can be...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2018-12-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2018.1538021 |
| _version_ | 1818296679240040448 |
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| author | S. Y. Yuan Z. H. Jiang J. Z. Liu Y. Tang Y. Zhang |
| author_facet | S. Y. Yuan Z. H. Jiang J. Z. Liu Y. Tang Y. Zhang |
| author_sort | S. Y. Yuan |
| collection | DOAJ |
| description | Twinning has been found to be a dominate mechanism in the γ′ precipitate strengthened Ni-based superalloys during service at intermediate temperatures. Here, high-resolution transmission electron microscopy and atomistic simulations have been combined to show that the twin nucleation process can be facilitated by Co replacing a fraction of Al in the γ′ precipitates, due to the negative binding energy of Co–Co atoms. The study further reveals that the presence of Co promotes a new twinning pathway featured with nucleation of one complex stacking fault (CSF) on the middle plane in between two separated CSFs. |
| first_indexed | 2024-12-13T04:07:22Z |
| format | Article |
| id | doaj.art-687fc45a15904a4da3dcdcad9335c08b |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-13T04:07:22Z |
| publishDate | 2018-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-687fc45a15904a4da3dcdcad9335c08b2022-12-22T00:00:09ZengTaylor & Francis GroupMaterials Research Letters2166-38312018-12-0161268368810.1080/21663831.2018.15380211538021Nano-twinning in a γ′ precipitate strengthened Ni-based superalloyS. Y. Yuan0Z. H. Jiang1J. Z. Liu2Y. Tang3Y. Zhang4Nanjing University of Science and TechnologyNanjing University of Science and TechnologyNanjing University of Science and TechnologyShanghai UniversityNanjing University of Science and TechnologyTwinning has been found to be a dominate mechanism in the γ′ precipitate strengthened Ni-based superalloys during service at intermediate temperatures. Here, high-resolution transmission electron microscopy and atomistic simulations have been combined to show that the twin nucleation process can be facilitated by Co replacing a fraction of Al in the γ′ precipitates, due to the negative binding energy of Co–Co atoms. The study further reveals that the presence of Co promotes a new twinning pathway featured with nucleation of one complex stacking fault (CSF) on the middle plane in between two separated CSFs.http://dx.doi.org/10.1080/21663831.2018.1538021Ni-based superalloystacking faultstwinningatomistic simulations |
| spellingShingle | S. Y. Yuan Z. H. Jiang J. Z. Liu Y. Tang Y. Zhang Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy Materials Research Letters Ni-based superalloy stacking faults twinning atomistic simulations |
| title | Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy |
| title_full | Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy |
| title_fullStr | Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy |
| title_full_unstemmed | Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy |
| title_short | Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy |
| title_sort | nano twinning in a γ precipitate strengthened ni based superalloy |
| topic | Ni-based superalloy stacking faults twinning atomistic simulations |
| url | http://dx.doi.org/10.1080/21663831.2018.1538021 |
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