Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C
Topologically close-packed (TCP) precipitates and deformation twins significantly impact the high-temperature performances of Ni-based single-crystal (SC) superalloys. However, their contributions to failure of superalloys remain unclear. This study, utilizing in situ thermal-nanomechanical testing...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-08-01
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| Series: | Materials Research Letters |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2514032 |
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| _version_ | 1849236045141377024 |
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| author | Zhe Hong Lingyi Kong Xinbao Zhao Xingpu Zhang Huajie Yang Jiangwei Wang Ze Zhang |
| author_facet | Zhe Hong Lingyi Kong Xinbao Zhao Xingpu Zhang Huajie Yang Jiangwei Wang Ze Zhang |
| author_sort | Zhe Hong |
| collection | DOAJ |
| description | Topologically close-packed (TCP) precipitates and deformation twins significantly impact the high-temperature performances of Ni-based single-crystal (SC) superalloys. However, their contributions to failure of superalloys remain unclear. This study, utilizing in situ thermal-nanomechanical testing at 900°C, reveals a twinning-induced shear fracture in sub-micrometer superalloys containing TCP phases. Under <110>m tension, nanotwins nucleation dominates over the shear sliding at pre-existing σ/matrix interface, inducing shear fracture via the twin boundary (TB) sliding. Density functional theory calculations confirm that TBs exhibit weaker shear resistance than the σ/matrix interfaces. These findings provide insights into twinning-induced premature failure of SC superalloys under service conditions. |
| format | Article |
| id | doaj-art-f7fca4ebb3ad4536adfd5ebad681bf17 |
| institution | Kabale University |
| issn | 2166-3831 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj-art-f7fca4ebb3ad4536adfd5ebad681bf172025-08-20T04:02:31ZengTaylor & Francis GroupMaterials Research Letters2166-38312025-08-0113879380010.1080/21663831.2025.2514032Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°CZhe Hong0Lingyi Kong1Xinbao Zhao2Xingpu Zhang3Huajie Yang4Jiangwei Wang5Ze Zhang6Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaCenter of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaCenter of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaSuzhou Laboratory, Suzhou, People’s Republic of ChinaCenter of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaTopologically close-packed (TCP) precipitates and deformation twins significantly impact the high-temperature performances of Ni-based single-crystal (SC) superalloys. However, their contributions to failure of superalloys remain unclear. This study, utilizing in situ thermal-nanomechanical testing at 900°C, reveals a twinning-induced shear fracture in sub-micrometer superalloys containing TCP phases. Under <110>m tension, nanotwins nucleation dominates over the shear sliding at pre-existing σ/matrix interface, inducing shear fracture via the twin boundary (TB) sliding. Density functional theory calculations confirm that TBs exhibit weaker shear resistance than the σ/matrix interfaces. These findings provide insights into twinning-induced premature failure of SC superalloys under service conditions.https://www.tandfonline.com/doi/10.1080/21663831.2025.2514032Ni-based single-crystal superalloysDeformation twinsTwin boundary slidingShear fracture |
| spellingShingle | Zhe Hong Lingyi Kong Xinbao Zhao Xingpu Zhang Huajie Yang Jiangwei Wang Ze Zhang Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C Materials Research Letters Ni-based single-crystal superalloys Deformation twins Twin boundary sliding Shear fracture |
| title | Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C |
| title_full | Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C |
| title_fullStr | Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C |
| title_full_unstemmed | Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C |
| title_short | Twinning-induced shear fracture of sub-micrometer Ni-based single-crystal superalloys at 900°C |
| title_sort | twinning induced shear fracture of sub micrometer ni based single crystal superalloys at 900°c |
| topic | Ni-based single-crystal superalloys Deformation twins Twin boundary sliding Shear fracture |
| url | https://www.tandfonline.com/doi/10.1080/21663831.2025.2514032 |
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