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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.13061 |
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| _version_ | 1866909227205787648 |
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| author | Jbara, Wajih Maurel, Vincent Ammar, Kais Forest, Samuel |
| author_facet | Jbara, Wajih Maurel, Vincent Ammar, Kais Forest, Samuel |
| contents | Complex microstructure evolution has been observed \rev{both bare and coated } Ni-based single crystal superalloys. Rafting and $γ'$ depletion are investigated in this study through a brief experimental analysis and a detailed phase field model to account for mechanical-diffusion coupling. The proposed model has been implemented in a finite element code. As a main result, it is shown that rafting, $γ'$ depletion close to free surface/oxide layer or $γ'$ coalescence close to coating layer, and mechanical behavior are strongly coupled. The local additional flux of Al explains this coupling to a large extent. Finally, a discussion of strain localization and local flux of Al paves the way for clarification of these cases that degrade the performance of superalloys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_13061 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effect of free surface, oxide and coating layers on rafting in $γ-γ'$ superalloys Jbara, Wajih Maurel, Vincent Ammar, Kais Forest, Samuel Applied Physics Complex microstructure evolution has been observed \rev{both bare and coated } Ni-based single crystal superalloys. Rafting and $γ'$ depletion are investigated in this study through a brief experimental analysis and a detailed phase field model to account for mechanical-diffusion coupling. The proposed model has been implemented in a finite element code. As a main result, it is shown that rafting, $γ'$ depletion close to free surface/oxide layer or $γ'$ coalescence close to coating layer, and mechanical behavior are strongly coupled. The local additional flux of Al explains this coupling to a large extent. Finally, a discussion of strain localization and local flux of Al paves the way for clarification of these cases that degrade the performance of superalloys. |
| title | Effect of free surface, oxide and coating layers on rafting in $γ-γ'$ superalloys |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2406.13061 |