About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Predicting Solid-state Precipitation in High-strength Aluminium Alloys |
Author(s) |
Shenghan Su, Laure Bourgeois, Nikhil V. Medhekar |
On-Site Speaker (Planned) |
Shenghan Su |
Abstract Scope |
The presence of plate-shaped precipitate phases on {100} or {111} planes is the key contribution to the high-strength of structural aluminium alloys. Because these precipitate phases have one dimension at the nanoscale, and their nucleation and growth process may be greatly influenced by certain microalloying elements, many such precipitate phases remain unknown. Using advanced computational methods, we have designed a straightforward workflow to predict the type, crystallography and sequence of precipitate phases in aluminium alloys. We have successfully applied this method to the unexplored Al-Pt system (Su et al. Acta Mater. 255 (2023) 119048). The Al2Pt precipitate phase is predicted to nucleate first among several phases and to exhibit a high-aspect ratio plate shape on {100} planes. We will also discuss the effect of microalloying elements in a substitutional mechanism for enhancing the precipitation of major strengthening phases in widely used Al-Cu alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Computational Materials Science & Engineering, Phase Transformations |