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 |
| Published: |
Taylor & Francis Group
2025-08-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2517734 |
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| Summary: | 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. |
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| ISSN: | 2166-3831 |