About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification X
|
| Presentation Title |
Real Time Electric Current Processing of Directionally Solidified Eutectics by Transmission X-ray Microscopy |
| Author(s) |
Jonathan Goettsch, Ashwin Shahani, Xianghui Xiao, Alan Taub |
| On-Site Speaker (Planned) |
Jonathan Goettsch |
| Abstract Scope |
A compact experimental apparatus was designed at National Synchrotron Light Source-II to enable in situ X-ray nano-radiography and tomography during electric current solidification processing of an Al-33.3wt.%Cu eutectic alloy. The system was designed to accommodate the tight spatial constraints of a Bridgman-type furnace while ensuring sufficient X-ray transmission for high-resolution imaging. Performance tests confirmed stable circuit continuity during thermal cycling and sufficient contrast for 3D reconstruction of fully solidified samples. Using a unipolar 0.5 Hz square wave, in situ nano-radiography captured the dynamic changes in the position of the solid-liquid interface during directional solidification, revealing significant modification of the interface motion under the effect of electric current. Tomographic reconstruction demonstrates the capability to visualize the as-solidified microstructure, namely the morphologies of the eutectic solids frozen behind the front. This design provides a platform for advancing the understanding of electric-current-modified solidification behavior in metallic systems at elevated temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Solidification |