| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
Nanostructures and Properties of Rapid Directional Solidification of Al Alloys |
| Author(s) |
Mohsen Asle Zaeem, Sepideh Kavousi |
| On-Site Speaker (Planned) |
Sepideh Kavousi |
| Abstract Scope |
Rapid directional solidification is an important part of several manufacturing processes. Besides the overall importance of determining the processing-structure-property relations in manufacturing processes, study directional solidification can provide important insights into the fundamentals of instabilities at the solid-liquid interfaces which result in complex nano/microstructures (e.g., dendrites). In this work, to overcome the difficulty of experiments in direct observation of nano/microstructural evolution during solidification of metals and alloys, we present a large scale molecular dynamics (MD) simulation framework based on the second nearest neighbor modified embedded atom method (2NN-MEAM) interatomic potentials to study nanostructures that form during the rapid solidification. Several solidification heterogeneities and defects such as twins, stacking faults, and second phase precipitates are detected to form in different Al alloys. These heterogeneities are determined to significantly affect the crystal growth during rapid directional solidification, as well as the nanostructures and properties of solidified alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |