| Abstract Scope |
Understanding the microsegregation during the solidification process is important. Partition coefficient describes the microsegregation behavior, and it can also be directly used to calculate the microstructural quantities. In this poster, several mechanisms that happen at different solidification rates will be quantitatively studied. The partition coefficient will deviate from its equilibrium value during a non-equilibrium solidification; however, no systematic method is available to predict this value at different solidification rates and very limited data can be found to verify the models. In this study, the rate-dependent partition coefficient is calculated from EPMA measurements, which are statistically meaningful and more accurate. In addition, the study will also focus on using different physics-based analytical methods, verified by the experimental data, to predict the microsegregation behaviors over a large solidification rate range. This study will provide a quantitative prediction capability to reveal the of microsegregation in different casting techniques for different Al binary alloys. |