Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold
The secondary orientation effect of platform defects was investigated in single crystal blades with different secondary orientations. The results showed that the orientations of the two groups of blades were well controlled, and the defects formed in the platform of (0o, 0o) orientation blades were...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425017715 |
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| author | Jiarun Qin Wenchao Yang Chen Liu Qiang Wang Zhao Xin Yanchao Zhang Yang Liu Haijun Su Lin Liu |
| author_facet | Jiarun Qin Wenchao Yang Chen Liu Qiang Wang Zhao Xin Yanchao Zhang Yang Liu Haijun Su Lin Liu |
| author_sort | Jiarun Qin |
| collection | DOAJ |
| description | The secondary orientation effect of platform defects was investigated in single crystal blades with different secondary orientations. The results showed that the orientations of the two groups of blades were well controlled, and the defects formed in the platform of (0o, 0o) orientation blades were mainly deformation dendrites, while those for blades with (0o, 26.5o) orientation were stray grains and large broken dendrites. For stray grains, it was found that the blades with (0o, 0o) orientation could allow the dendrites to occupy the platform space earlier, thus inhibiting the nucleation of stray grains, while the blades with (0o, 26.5o) orientation exhibited the opposite behavior. Besides, it was revealed that the shrinkage stress only caused the small broken dendrites at the corner, but did not induce deformation or large broken dendrites. Combined with fluid flow simulation, it was seen that the deformation dendrites for (0o, 0o) orientation blades were mainly formed at the initial stage of solidification, where the degree of convection was relatively uniform and low. However, the large broken dendrites for (0o, 26.5o) orientation blades were mainly formed at the later stage, where the thermal knots had increased the melt convection, making dendrites more prone to fracture. |
| format | Article |
| id | doaj-art-0c8e4a34682444d2b1a1c35d7148b097 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-0c8e4a34682444d2b1a1c35d7148b0972025-08-20T03:13:14ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01374362437110.1016/j.jmrt.2025.07.113Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput moldJiarun Qin0Wenchao Yang1Chen Liu2Qiang Wang3Zhao Xin4Yanchao Zhang5Yang Liu6Haijun Su7Lin Liu8State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China; Corresponding author.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaHunan University of Science and Technology, Xiangtan, 411201, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, ChinaThe secondary orientation effect of platform defects was investigated in single crystal blades with different secondary orientations. The results showed that the orientations of the two groups of blades were well controlled, and the defects formed in the platform of (0o, 0o) orientation blades were mainly deformation dendrites, while those for blades with (0o, 26.5o) orientation were stray grains and large broken dendrites. For stray grains, it was found that the blades with (0o, 0o) orientation could allow the dendrites to occupy the platform space earlier, thus inhibiting the nucleation of stray grains, while the blades with (0o, 26.5o) orientation exhibited the opposite behavior. Besides, it was revealed that the shrinkage stress only caused the small broken dendrites at the corner, but did not induce deformation or large broken dendrites. Combined with fluid flow simulation, it was seen that the deformation dendrites for (0o, 0o) orientation blades were mainly formed at the initial stage of solidification, where the degree of convection was relatively uniform and low. However, the large broken dendrites for (0o, 26.5o) orientation blades were mainly formed at the later stage, where the thermal knots had increased the melt convection, making dendrites more prone to fracture.http://www.sciencedirect.com/science/article/pii/S2238785425017715Secondary orientation controlSingle crystal bladesPlatform defectsFluid flow simulation |
| spellingShingle | Jiarun Qin Wenchao Yang Chen Liu Qiang Wang Zhao Xin Yanchao Zhang Yang Liu Haijun Su Lin Liu Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold Journal of Materials Research and Technology Secondary orientation control Single crystal blades Platform defects Fluid flow simulation |
| title | Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold |
| title_full | Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold |
| title_fullStr | Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold |
| title_full_unstemmed | Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold |
| title_short | Secondary orientation effect of the platform defects in [001] oriented single crystal blades prepared by high-throughput mold |
| title_sort | secondary orientation effect of the platform defects in 001 oriented single crystal blades prepared by high throughput mold |
| topic | Secondary orientation control Single crystal blades Platform defects Fluid flow simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425017715 |
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