| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Formation of Al3Sc Dispersoids and Associated Strengthening Mechanisms |
| Author(s) |
Thomas Dorin, Lu Jiang, Timothy Langan |
| On-Site Speaker (Planned) |
Thomas Dorin |
| Abstract Scope |
One of the main use of scandium is as an addition element in aluminum alloys as it results in significant improvement of a number of key properties including strength, corrosion resistance and formability. The benefits from scandium comes from the various influences it has on the alloys’ microstructure which can be summarized as four main effects, grain refinement, increased recrystallisation temperature, dispersoid strengthening and nucleation of strengthening phase. These mechanisms will be reviewed and the formation mechanisms of the L12 Al3Sc phase will be discussed. Optimizing the size and number density of Al3Sc is of crucial importance to get the maximum strengthening benefits from Sc additions. The heat treatment strategies to generate fine dispersions of dispersoids will be reviewed and the impact of Al3Sc on the breakdown of the solid solution in different alloy systems will be explored. Finally the addition of Zr in combination with Sc will be discussed. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Characterization, Mechanical Properties |