| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Solute Clustering during Natural Ageing in Al-Cu-(Sc)-(Zr) Alloys |
| Author(s) |
Lu Jiang, Kathleen Wood, Robert Knott, Anna Sokolova, Timothy Langan, Thomas Dorin |
| On-Site Speaker (Planned) |
Lu Jiang |
| Abstract Scope |
The present work investigates solute clustering during natural ageing in Al-4wt.%Cu alloys with and without Sc and Zr. The alloys were heat treated to form Al3(Sc, Zr) dispersoids before being solutionised at 500, 520 and 540°C followed by water quenching. Small-angle neutron scattering (SANS) was used to measure the size distribution of Al3(Sc, Zr) dispersoids in the Sc and Zr containing alloy. Clustering kinetics during natural ageing was quantified in-situ with small-angle x-ray scattering (SAXS). The in-situ SAXS results show that the presence of Al3(Sc, Zr) dispersoids significantly alters the solute cluster formation during natural ageing in the Al-Cu alloys. The altered natural ageing behaviour is explained by the presence of vacancies that is strongly influenced by the presence of Al3(Sc, Zr) dispersoids and solution treatment temperature. Atom probe tomography (APT) and transmission electron microscopy (TEM) are also used to reveal the underlying mechanism complementarily with the SAS results. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Characterization, Other |