About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
|
6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Eutectic Colony Evolution during Oscillatory Instability in Eutectic Solidification |
Author(s) |
Paul Chao, Ashwin J. Shahani |
On-Site Speaker (Planned) |
Paul Chao |
Abstract Scope |
A number of fundamental questions remain unanswered regarding the
dynamics of eutectic patterns with anisotropic interface energies. 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 insight into the mechanism of eutectic colony growth accommodating changes from growth velocity fluctuations. 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? |
Definite: Other |