About this Abstract |
| Meeting |
TMS Specialty Congress 2025
|
| Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
| Presentation Title |
Real-Time 3D Visualization of Eutectic Solidification Dynamics Using Limited Angle Tomography |
| Author(s) |
Soumyadeep Dasgupta, Paul Chao, Xianghui Xiao, Ashwin Shahani |
| On-Site Speaker (Planned) |
Soumyadeep Dasgupta |
| Abstract Scope |
Multi-phase 3D structure from eutectic solidification brings versatile properties to alloys. By studying solidification in real-time, we gain insights into interfacial dynamics, enabling improved control and design of advanced materials. Synchrotron X-ray nanotomography provides a 3D perspective of microstructural evolution at the nanoscale; however, its temporal resolution is constrained by factors, e.g., the microscope hardware capabilities, sample shape etc. To achieve sub-10s temporal resolution, we employ Limited Angle Tomography (LAT). Using LAT, we investigate the directional solidification of a near-eutectic Al-Al₃Ni alloy as a proof-of-concept. A novel composite reconstruction approach termed ‘pseudo-4D imaging’ mitigates artifacts inherent to LAT, allowing us to visualize the solidification process in 3D space and time. This technique relies upon data fusion of real-time radiographs with postmortem 3D reconstruction of the fully-solidified specimen. The approach holds promise not only for solidification science but also for the 3D characterization of other time-sensitive phenomena within constrained viewing windows. |
| Proceedings Inclusion? |
Undecided |