Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations
This study systematically analyzed the microstructure, grain boundary, and dislocation evolution of a novel directionally solidified superalloy with excellent creep resistance under different conditions and the alloy outperformed first-generation single-crystal superalloys in creep resistance. Exper...
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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/10.1080/21663831.2025.2517734 |
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| _version_ | 1849768158327472128 |
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| author | Yunpeng Fan Xinbao Zhao Yu Zhou Yuan Cheng Shuli Zeng Quanzhao Yue Wanshun Xia Yuefeng Gu Ze Zhang |
| author_facet | Yunpeng Fan Xinbao Zhao Yu Zhou Yuan Cheng Shuli Zeng Quanzhao Yue Wanshun Xia Yuefeng Gu Ze Zhang |
| author_sort | Yunpeng Fan |
| collection | DOAJ |
| description | This study systematically analyzed the microstructure, grain boundary, and dislocation evolution of a novel directionally solidified superalloy with excellent creep resistance under different conditions and the alloy outperformed first-generation single-crystal superalloys in creep resistance. Experimental results revealed that higher temperatures inhibited the broadening of grain boundary serrations while reducing the degree of topological inversion and delaying the widening of γ channels. Dislocation behavior analysis showed that lower temperature promoted the formation of a superdislocation network, which effectively pinned the motion of superdislocations, reducing the creep rate during the secondary creep stage and delaying the transition to tertiary creep. |
| format | Article |
| id | doaj-art-37c2c698fe7f4eb688e88ca6bce1a5fd |
| institution | DOAJ |
| issn | 2166-3831 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj-art-37c2c698fe7f4eb688e88ca6bce1a5fd2025-08-20T03:03:55ZengTaylor & Francis GroupMaterials Research Letters2166-38312025-08-0113880180910.1080/21663831.2025.2517734Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocationsYunpeng Fan0Xinbao Zhao1Yu Zhou2Yuan Cheng3Shuli Zeng4Quanzhao Yue5Wanshun Xia6Yuefeng Gu7Ze Zhang8Institute of Superalloys Science and Technology, 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 ChinaInstitute of Superalloys Science and Technology, 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 ChinaInstitute of Superalloys Science and Technology, 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 ChinaInstitute of Superalloys Science and Technology, 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 ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of ChinaThis study systematically analyzed the microstructure, grain boundary, and dislocation evolution of a novel directionally solidified superalloy with excellent creep resistance under different conditions and the alloy outperformed first-generation single-crystal superalloys in creep resistance. Experimental results revealed that higher temperatures inhibited the broadening of grain boundary serrations while reducing the degree of topological inversion and delaying the widening of γ channels. Dislocation behavior analysis showed that lower temperature promoted the formation of a superdislocation network, which effectively pinned the motion of superdislocations, reducing the creep rate during the secondary creep stage and delaying the transition to tertiary creep.https://www.tandfonline.com/doi/10.1080/21663831.2025.2517734Nickel-based directionally solidified superalloycreepraft structuregrain boundary serrationsuperdislocation |
| spellingShingle | Yunpeng Fan Xinbao Zhao Yu Zhou Yuan Cheng Shuli Zeng Quanzhao Yue Wanshun Xia Yuefeng Gu Ze Zhang Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations Materials Research Letters Nickel-based directionally solidified superalloy creep raft structure grain boundary serration superdislocation |
| title | Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations |
| title_full | Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations |
| title_fullStr | Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations |
| title_full_unstemmed | Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations |
| title_short | Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations |
| title_sort | exceptional creep resistance of a directionally solidified superalloy temperature dependent evolution of microstructure and dislocations |
| topic | Nickel-based directionally solidified superalloy creep raft structure grain boundary serration superdislocation |
| url | https://www.tandfonline.com/doi/10.1080/21663831.2025.2517734 |
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