| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification: An MPMD Symposium Honoring Jonathan A. Dantzig
|
| Presentation Title |
Observation of Growing Dendrites by Time-resolved Tomography and Image Processing Using a Phase-field Model |
| Author(s) |
Hideyuki Yasuda, Arisa Nishiguchi, Ryoji Katsube, Taka Narumi, Tomohiro Takaki |
| On-Site Speaker (Planned) |
Hideyuki Yasuda |
| Abstract Scope |
Time-resolved tomography (4D-CT) using synchrotron radiation X-rays has allowed us to observe dendritic growth in metallic alloy systems in situ. However, it is still tricky for Fe- and Ni-based alloys to trace the solid-liquid interface precisely by 4D-CT because of the large X-ray absorption coefficient and the slight difference in the coefficients between the solid and the liquid. In 4D-CT, the reconstructed images were typically obtained every 0.5 - 4 s (cubic voxel of 6.5 μm) and every 4 – 8 s (2 μm) for Al and Fe-based alloys. In image processing using a phase-field model, the solid fractions estimated from 4D-CT were used as a restraint condition, and the phase-field filtering modified the solid-liquid interface in terms of the local curvature. The image processing enabled to evaluate the interface area and the curvatures. The quantitative characterization and some applications of characterization will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Characterization, Computational Materials Science & Engineering |