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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2508.09018 |
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| _version_ | 1866915634262048768 |
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| author | Yadav, Chandra Bhusan London, Andrew J. Tadic, Tonci Xu, Ruqing Liu, Wenjun Fazinic, Stjepko Das, Suchandrima |
| author_facet | Yadav, Chandra Bhusan London, Andrew J. Tadic, Tonci Xu, Ruqing Liu, Wenjun Fazinic, Stjepko Das, Suchandrima |
| contents | Fe-Cr binary alloys serve as simplified model systems to study irradiation damage relevant to fusion structural materials. Here, Fe-3%Cr and Fe-5%Cr samples were irradiated with 4 MeV Fe ions under a dose rate of 4x10^5 dpa/s across a linear thermal gradient (120C to 480C) in a single experiment, enabling direct comparison of temperature and Cr content effects under identical conditions. Depth-resolved Laue micro-diffraction (~10^4 strain sensitivity), nanoindentation, and AFM reveal non-monotonic evolution of lattice strain and hardness: both decrease with temperature up to ~300C, then increase beyond. This turning point reflects a shift from enhanced defect mobility and partial recovery to solute-defect clustering and cavity formation, which stabilize damage. Fe-3%Cr shows consistently higher strain and hardening than Fe-5%Cr, especially at lower temperatures. Minimal change in post-indentation pile-up indicates limited softening or localization. These results highlight how Cr content and temperature jointly affect irradiation response, offering new insights into defect evolution in fusion-relevant alloys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09018 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Characterisation of Irradiation Damage in Fe3Cr and Fe5Cr: A Study on the Effects of Chromium Content and Temperature Yadav, Chandra Bhusan London, Andrew J. Tadic, Tonci Xu, Ruqing Liu, Wenjun Fazinic, Stjepko Das, Suchandrima Materials Science Fe-Cr binary alloys serve as simplified model systems to study irradiation damage relevant to fusion structural materials. Here, Fe-3%Cr and Fe-5%Cr samples were irradiated with 4 MeV Fe ions under a dose rate of 4x10^5 dpa/s across a linear thermal gradient (120C to 480C) in a single experiment, enabling direct comparison of temperature and Cr content effects under identical conditions. Depth-resolved Laue micro-diffraction (~10^4 strain sensitivity), nanoindentation, and AFM reveal non-monotonic evolution of lattice strain and hardness: both decrease with temperature up to ~300C, then increase beyond. This turning point reflects a shift from enhanced defect mobility and partial recovery to solute-defect clustering and cavity formation, which stabilize damage. Fe-3%Cr shows consistently higher strain and hardening than Fe-5%Cr, especially at lower temperatures. Minimal change in post-indentation pile-up indicates limited softening or localization. These results highlight how Cr content and temperature jointly affect irradiation response, offering new insights into defect evolution in fusion-relevant alloys. |
| title | Characterisation of Irradiation Damage in Fe3Cr and Fe5Cr: A Study on the Effects of Chromium Content and Temperature |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.09018 |