| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Interphase Boundary Anisotropy Effects on the Microstructure Evolution in Three Phase β(In) – In2Bi – γ(Sn) Eutectic System |
| Author(s) |
Samira Mohagheghi, Melis Serefoglu |
| On-Site Speaker (Planned) |
Melis Serefoglu |
| Abstract Scope |
Anisotropy in the crystal/crystal surface energy strongly affects the microstructure evolution in eutectics. Accordingly, four different classes of three-phase eutectic grains (EG) as a function of interphase anisotropy, namely, quasi-isotropic, nearly-locked, locked, and rod-within-lamellae (RL3), were recently identified by the authors. In this work, we address the origins of observing substantially different microstructures in these three-phase EG by performing real-time rotating directional solidification (RDS) experiments on In-Bi-Sn model alloy system. We identified that the morphology of phases changes substantially in RL3 grains during RDS although they remain to be lamellae in all other EG types. More specifically, while the morphology of β(In) phases change between rod and lamellar, major axis of γ(Sn) lamella becomes parallel and perpendicular to the sample plane in every half rotation of the sample. Complimentary EBSD and XRD studies show the strong influence of crystals orientation with respect to the sample plane on the microstructures. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |