| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
Investigation of the Mechanisms Behind Irradiation-Induced Grain Subdivision |
| Author(s) |
Bao-Phong H. Nguyen, Assel Aitkaliyeva, Sadie A. Wicks |
| On-Site Speaker (Planned) |
Sadie A. Wicks |
| Abstract Scope |
The fundamental mechanisms behind irradiation-induced grain subdivision (IIGS), commonly observed in nuclear fuels, are unclear. Numerous theories exist on what drives IIGS. Most prevalent theories include i) formation of subgrains from dislocations to form low angle grain boundaries, ii) discrete grain nucleation to form high angle grain boundaries, or iii) a combination of both. In this contribution, we induce IIGS in pure aluminum irradiated with He ions under various conditions and observe evolution of dislocation structures and internal stresses, thus shedding light on the fundamental mechanisms responsible for IIGS. We use a combination of electron backscatter diffraction (EBSD) to identify grain subdivision and transmission electron microscopy (TEM) to quantify defect structures in samples exhibiting IIGS. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |