| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Comparison of Solidification Characteristics of In-situ X-radiography Experiments and DNN Simulations |
| Author(s) |
Maike Becker, Laszlo Sturz, Dirk Bräuer, Florian Kargl |
| On-Site Speaker (Planned) |
Maike Becker |
| Abstract Scope |
We use a combination of experimental analysis and dendrite needle network (DNN) computation to compare the measured and simulated solidification characteristics in a thin Al-Ge alloy. Dendrite tip growth velocities and concentration fields are extracted from in situ X-radiography experiments. We find one parameter set to accurately reproduce all experimentally measured solidification characteristics with the three-dimensional DNN model. It is the first study, which quantitatively compares equiaxed dendritic growth velocities, concentration fields and solid fractions. We use the experimental analysis and a previous phase-field simulation to approximate certain unknown model parameters (initial undercooling, selection constant) and additionally perform a DNN parameter study to eventually find the best fitting parameters. Furthermore, we explore the role of the thin sample geometry. We find that it has a great influence on the solidification characteristics when the undercooling in the system is small (< 15 K). |
| Proceedings Inclusion? |
Planned: |