About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
C-7: Physics Based Simulations of Competitive Grain Growth in Nickel Superalloys |
| Author(s) |
Peter Soar, Ivars Krastins, Matthaios Alexandrakis, Paul Brown, Owen Draper, Nick Green, Andrew Kao |
| On-Site Speaker (Planned) |
Peter Soar |
| Abstract Scope |
The phenomena of dendritic competition during the solidification of metal alloys are a critical element in the formation of grain boundaries and other features that dictate the material properties of the cast part. In single crystal castings of Nickel superalloys, unplanned secondary grain formation initiates a bi-crystal competition that can lead to unwanted microstructural features if the secondary grain is viable, however the system of bi-crystal competition in a 3D space remains a poorly understood system both experimentally and in numerical modelling, especially when the impact of additional physics like fluid flow and mechanical responses are considered. To better elucidate these mechanisms a numerical modelling study using a Cellular Automata dendritic solidification code is used for examining bi-crystal competition at industrially relevant scales. This study will examine critical variables impacting grain viability such as the 3D dendrite orientation, part geometry, temperature conditions and the influence of buoyancy driven fluid flow. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Solidification, High-Temperature Materials |