About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification X
|
| Presentation Title |
Dislocation Networks and Cellular Structures in Metal Additive Manufacturing |
| Author(s) |
Adriana Eres-Castellanos, Omar Mireles, Matthew M. Schneider, Amy Eres Clarke |
| On-Site Speaker (Planned) |
Adriana Eres-Castellanos |
| Abstract Scope |
Additive manufacturing (AM) has garnered significant attention. Microstructures formed by rapid solidification predominantly consist of cellular/dendritic structures with dislocation (i.e., defect) networks that enhance mechanical properties. Various mechanisms for the formation of dislocation networks in cellular structures have been proposed, although recent studies have concluded that the primary source of dislocations in AM metals is deformation induced by thermal expansion/shrinkage. However, these works did not fully address thermal variations or fluid flow-induced dendrite mechanical deformation. A solidification study with controlled thermal states and convection under solidification conditions representative of AM is required to better understand dislocation network formation during cellular/dendritic growth to control mechanical properties. In this work, we study the formation of dislocations in cellular-dendritic structures in selected Al-Cu alloys, subjected to simulated AM conditions. Samples are characterized using advanced electron microscopy techniques, and compared to the solidification thermal conditions, modeled by Computational Fluid Dynamics (CFD). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |