Unexpected Planar Dislocation Boundary Formation in FCC Metals Captured by Dark-Field X-ray Microscopy and Continuum Dislocation Dynamics
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866915846148849664 |
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| author | Cretton, Adam André William SharafEldin, Khaled Henningsson, Axel Frankus, Felix Yıldırım, Can Detlefs, Carsten Grumsen, Flemming Bjerg Zelenika, Albert El-Azab, Anter Winther, Grethe Poulsen, Henning Friis |
| author_facet | Cretton, Adam André William SharafEldin, Khaled Henningsson, Axel Frankus, Felix Yıldırım, Can Detlefs, Carsten Grumsen, Flemming Bjerg Zelenika, Albert El-Azab, Anter Winther, Grethe Poulsen, Henning Friis |
| contents | Validating dislocation patterning models against in situ imaging experiments is a longstanding goal in materials physics. Here, we provide the first direct morphological comparison of such models. Using in situ Dark-Field X-ray Microscopy (DFXM), we map the local orientations in high-purity aluminium deformed along [100] and find unexpected planar dislocation boundaries aligned with {111} slip planes that form prior to the development of a conventional dislocation cell structure. To explain this behaviour, we generate synthetic DFXM contrast images from a continuum dislocation dynamics (CDD) simulation. This mesoscale model, using nickel as a high stacking fault energy (SFE) FCC analogue, independently predicts the formation of the same {111} planar boundary types. This correspondence demonstrates that state-of-the-art CDD and DFXM experimental data can be used synergistically - despite differences in strain rates and length scales - as a practical route for refining continuum theories of plasticity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_08161 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Unexpected Planar Dislocation Boundary Formation in FCC Metals Captured by Dark-Field X-ray Microscopy and Continuum Dislocation Dynamics Cretton, Adam André William SharafEldin, Khaled Henningsson, Axel Frankus, Felix Yıldırım, Can Detlefs, Carsten Grumsen, Flemming Bjerg Zelenika, Albert El-Azab, Anter Winther, Grethe Poulsen, Henning Friis Materials Science Validating dislocation patterning models against in situ imaging experiments is a longstanding goal in materials physics. Here, we provide the first direct morphological comparison of such models. Using in situ Dark-Field X-ray Microscopy (DFXM), we map the local orientations in high-purity aluminium deformed along [100] and find unexpected planar dislocation boundaries aligned with {111} slip planes that form prior to the development of a conventional dislocation cell structure. To explain this behaviour, we generate synthetic DFXM contrast images from a continuum dislocation dynamics (CDD) simulation. This mesoscale model, using nickel as a high stacking fault energy (SFE) FCC analogue, independently predicts the formation of the same {111} planar boundary types. This correspondence demonstrates that state-of-the-art CDD and DFXM experimental data can be used synergistically - despite differences in strain rates and length scales - as a practical route for refining continuum theories of plasticity. |
| title | Unexpected Planar Dislocation Boundary Formation in FCC Metals Captured by Dark-Field X-ray Microscopy and Continuum Dislocation Dynamics |
| topic | Materials Science |
| url | https://arxiv.org/abs/2603.08161 |