| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys
|
| Presentation Title |
Formation of Metastable Spiral Patterns during Directional Eutectic Solidification |
| Author(s) |
Saman Moniri, Ashwin Shahani |
| On-Site Speaker (Planned) |
Ashwin Shahani |
| Abstract Scope |
The recent discovery of spiral patterns in the Al-Ag-Cu ternary eutectic system has excited much interest in the solidification science community. Herein we report on a different class of eutectic spiral — one that is metastable, two-phase, and faceted — in the Zn-Mg alloy system. To better understand the emergence of such structures from a parent liquid phase, we have conducted a multimodal investigation using X-ray nanotomography, 3D electron backscatter diffraction, and further electron microscopy. Our correlative imaging workflow provides new insights into the complex morphology, crystallography, and underlying growth mechanism of the faceted eutectic spirals. It is anticipated that these results will provide the necessary benchmark data for simulations (e.g., phase field) of multiphase solidification patterns. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |