| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Lamellar Spacing Selection during Oscillatory Eutectic Solidification |
| Author(s) |
Paul Chao, Ashwin Shahani |
| On-Site Speaker (Planned) |
Paul Chao |
| Abstract Scope |
A number of fundamental questions remain unanswered regarding the dynamics of eutectic patterns with isotropic interfaces. Here, we observe experimentally the solidification behavior of an Al-Cu binary eutectic as a model system using a novel imaging approach that combines in-situ X-ray radiography and ex-situ X-ray tomography. The former allows us to trace the solid-liquid interfaces while the latter enables us to visualize the solid-solid interfaces. When put together, we can quantify the development of a highly branched and three-dimensional microstructure in the presence of an oscillatory solid-liquid interface velocity. These details provide direct insight into the mechanism of lamella creation and elimination as the lamellar spacing accommodates fluctuations in growth velocity. Our quasi-4D tomography approach holds broad appeal to the solidification science community, as it can temporally resolve the solidification process on the order of seconds and spatially resolves individual lamellae on the order of micrometers. |
| Proceedings Inclusion? |
Planned: |