| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Calculating the Eutectic Coupled Zone in a Ternary System via Genetic Optimization |
| Author(s) |
George R. Lindemann, Ashwin J. Shahani |
| On-Site Speaker (Planned) |
George R. Lindemann |
| Abstract Scope |
Genetic algorithms (GA) are utilized, under a set of specific assumptions, to connect a model for growth in three-phase eutectic systems to the experimentally determined coupled zone for the Al-Ag-Cu ternary system. GA was used to deduce values for the various kinetic coefficients so as to minimize mismatch between the experimental coupled zone data and that of one mathematically derived. Sixteen different combinations of kinetic coefficients were found to accurately predict above 90% of the provided sample points for a set of growth velocity (V) and temperature gradient (G) measurements. For further validation, samples of varying V and G were prepared and characterized through correlative electron microscopy and 3D X-ray micro-tomography. Primary-phase, two phase, and three-phase eutectic microstructures were identified in the as-solidified samples then compared against the predictions of the derived model. It is anticipated that such a machine driven approach may find applicability in other areas of solidification science. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |