| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Phase Diagrams Applied to Materials Design and Processing: An FMD/SMD Symposium Honoring Rainer Schmid-Fetzer
|
| Presentation Title |
Inputs from computational thermodynamics for grain size prediction and alloy design |
| Author(s) |
Mark A. Easton, David StJohn, Mark Gibson, Ma Qian |
| On-Site Speaker (Planned) |
Ma Qian |
| Abstract Scope |
This talk focuses on the intersection of the work of Schmid-Fetzer and our work on grain refinement of light alloys and in magnesium alloy design. The Interdependence Model of grain refinement incorporates the effect of alloy concentration on grain size, particularly in multi-component alloys. Earlier work added the contributions of the different elements, then it was fundamentally understood as a thermodynamic factor based on the initial rate of development of constitutional supercooling, which was developed into Qtrue by Schmid-Fetzer. One of the challenges in the development of rare-earth containing magnesium alloys is that the rare earths come as misch-metal. Hence, it is important to understand how the mixture different rare-earths behave in microstructure formation. A collaboration with Schmid-Fetzer developed the databases from which the solidification path and phase selection were able to be predicted. This enabled the development of alloys with low hot tearing tendency and exceptional creep performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Aluminum, Solidification |