| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Unraveling the Effect of Solid-liquid Interfacial Anisotropy on Pattern Formation in Rapid Directional Solidification of Binary Alloys |
| Author(s) |
Ghavam Azizi, Mohsen Asle Zaeem |
| On-Site Speaker (Planned) |
Ghavam Azizi |
| Abstract Scope |
Intrinsic properties of the solid-liquid interface play a key role on determination of morphological pattern in alloys solidification. Using molecular dynamic simulation, the interfacial energy and its anisotropy are determined for different Al-Cu alloys. The effect of solid-liquid interface properties on interface stability, solidification pattern, segregation of solute atoms, and final phase fractions are investigated using phase-field modeling. While at low anisotropy values cellular pattern is dominant, by increasing anisotropy the interface becomes less stable and dendritic pattern forms. Furthermore, by increasing anisotropy value the primary and secondary arm spacing decreases, the growth velocity of dendrites increases, and less Al2Cu (θ-phase) forms in final structure. It is also shown that the effect of interface anisotropy is more pronounced at higher cooling rates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Computational Materials Science & Engineering, |