| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals
|
| Presentation Title |
A Quantitative Study of Microsegregation Mechanisms in Aluminum Binary Alloys |
| Author(s) |
Zhenjie Yao, Yang Huo, Mei Li, John Allison |
| On-Site Speaker (Planned) |
Zhenjie Yao |
| Abstract Scope |
Understanding the microsegregation that occurs during typical solidification processes is important. The alloy partition coefficient describes the microsegregation behavior and can be directly used to calculate microstructural quantities. Previous research has shown that the alloy partition coefficient deviates from equilibrium in most solidification processes, however, no systematic method is available to predict this value over a range of solidification rates. Furthermore, very limited data can be found to verify existing models. In this presentation, several mechanisms that occur at different solidification rates will be quantitatively studied. The rate-dependent partition coefficient is inferred from a statistically meaningful EPMA measurement. In addition, a physics-based analytical method, verified by the experimental data, is employed to predict the microsegregation behaviors over a large range of solidification rates. This study will provide a quantitative prediction of microsegregation for different casting techniques for a number of important Al binary alloys. |
| Proceedings Inclusion? |
Planned: |