About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Influence of Interphase Boundary Anisotropy on the Formation of Lamellar Eutectic Solidification Patterns |
Author(s) |
Mathis O. Plapp, Supriyo Ghosh, Sabine Bottin-Rousseau, Silvčre Akamatsu |
On-Site Speaker (Planned) |
Mathis O. Plapp |
Abstract Scope |
Lamellar eutectic two-phase growth is in principle well understood for alloys in which the solid-liquid and solid-solid interfaces are isotropic. However, there are numerous experimental observations that cannot be explained by theories and numerical models with isotropic interfaces, such as lamellar growth directions that markedly differ from the direction of the temperature gradient, or the emergence of large regions of perfectly aligned lamellae in large samples. We have developed a phase-field model in which the anisotropy of each interface can be controlled separately, and we have investigated the case of anisotropic solid-solid (interphase) boundaries. Results will be presented (i) on the selection of lamellar growth directions in thin-sample directional solidification, (ii) on the ordering of lamellae in bulk samples, and (iii) on the dynamics of spacing homogenization in inhomogeneous lamellar arrays. Simulation data will be compared to available theories and experimental data. |
Proceedings Inclusion? |
Planned: |