About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Cast Shop Technology
|
Presentation Title |
Effect of Nucleant Particle Size Distribution on the Grain Refining Efficiency of 7xxx Alloys |
Author(s) |
Georges Salloum-Abou-Jaoude, Philippe Jarry, Pierre Celle, Emmanuelle Sarrazin |
On-Site Speaker (Planned) |
Georges Salloum-Abou-Jaoude |
Abstract Scope |
To refine the as-cast grains of aluminium alloy products, the industry uses grain refiners of different nature, Al-Ti-B or Al-Ti-C. It is commonly known, that depending on their nature, grain refiners have different nucleant particle size distributions. In this work, we highlight the presence of significant differences in particle size distributions in grain refiners of the same nature depending on the producer, but also inconsistencies within production batches from the same manufacturer. We demonstrate the importance of the grain refiner nucleant size distribution on the grain refiner efficiency for aluminium alloys by means of SEM analysis and grain refiner casting tests. We discuss the phenomena linking nucleant particle size distribution to grain refiner efficiency by modelling and in situ X-ray radiography of solidification experiments.
Using our experimental and modelling results, we emphasise the necessity of controlling the nucleant particle size distribution to assure grain refiner efficiency. |
Proceedings Inclusion? |
Planned: Light Metals |