|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|Growth, Coarsening, and Fragmentation of Dendritic Microstructures in Metallic Materials
|Tiberiu Stan, Zachary Thompson, Peter Voorhees
|On-Site Speaker (Planned)
The dendritic microstructures that initially form and evolve during solidification of metals have a major impact on the final material properties. However, the details of dendritic growth, coarsening, and fragmentation are not well understood, making it difficult to accurately model these phenomena and design improved processing methods. We use in-situ x-ray computed tomography and serial sectioning to produce 4D and 3D datasets, respectively, and to gain new insights into the phase transformation and microstructural evolution phenomena. The dendritic morphologies, length scales, and crystallographic growth orientations are characterized for a variety of metallic alloys and processing conditions. Furthermore, insights into the causes of dendrite arm fragmentation events and their distribution throughout microstructures are discussed. These findings will be used to elucidate the microstructural evolution mechanisms and to produce benchmark data for modelling efforts.
|Aluminum, Phase Transformations, Solidification