About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Melt Processing, Casting and Recycling
|
| Presentation Title |
In Situ Dual-Scale Optical Observation of Microstructure Formation During Directional Solidification of Metallic Alloys in Thin Samples |
| Author(s) |
Eliane Farhi, Bumedijen Raka, Kamal Sbargoud, Georges Salloum-Abou-Jaoude, Silvère Akamatsu, Sabine Bottin-Rousseau |
| On-Site Speaker (Planned) |
Georges Salloum-Abou-Jaoude |
| Abstract Scope |
Increasing post-consumer scrap share during recycling is essential for reducing the aluminum industry's scope 3 carbon footprint. This leads to higher levels of Fe and Si impurities, increasing the phase fraction of Al-Fe-Si intermetallics (IMs). Recent developments in direct observations helps us understand nucleation and growth phenomena of these IMs and could guide alloy design to minimize their negative impact on final formability properties.
We present an in situ experimental study using directional solidification of model Al-Fe-Si-Mn-based alloys in thin samples. Real-time dual-optics imaging captures the nucleation and growth of IM crystals under well-controlled solidification conditions over a large temperature range. This method is combined with ex-situ crystallographic and chemical analysis (EDX) and Electron Backscatter Diffraction (EBSD) for phase identification and crystallographic quantification. The kinetics of growth and morphological transitions from divorced growth of faceted IM crystals in the liquid to coupled α-AlFe_Al-FCC growth in these alloys is analyzed. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Solidification, Recycling and Secondary Recovery |