| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Melt Processing, Casting and Recycling
|
| Presentation Title |
The Effect of Nucleating Particle Agglomerates on Grain Refiner Efficiency of 7xxx Aluminium Alloys |
| Author(s) |
Christopher Jr Wheatley, Georges Salloum-Abou-Jaoude |
| On-Site Speaker (Planned) |
Georges Salloum-Abou-Jaoude |
| Abstract Scope |
Grain refining rods are instrumental ingredients to achieve small equiaxed grains in direct chill casting of aluminum alloys. Al-Ti-B and Al-Ti-C grain refiners are both widely used in industrial production, but the quality of the grain refiner microstructure, such as particle size distribution, the presence of particle agglomerates, and homogeneity of the composition can all have significant effect on the final cast aluminium microstructure. However, the relationship between nucleating particle agglomerates and the final cast microstructure is not fully understood.
In previous TMS2020 and TM2023 studies, we presented evidence of Al-Ti-B particle size distribution on grain refiner efficiency and established a Cellular-Automated-Finite-Element (CAFE) model to predict the final microstructure. This work focuses on the effect of TiC agglomerates on the efficiency of Al - 3 wt%Ti - 0.15 wt%C based grain refiners in 7xxx alloys with and without Ceramic Foam Filtration prior to casting. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Solidification, |