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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Applications of Solidification Fundamentals
Presentation Title On the Transition from Equiaxed Sedimentation to Viscoplastic Packed Bed Dynamics
Author(s) Andreas Ludwig, Menghuai Wu, Christian M.G. Rodrigues, Tobias Holzmann, Alexander Vakhrushev
On-Site Speaker (Planned) Andreas Ludwig
Abstract Scope During equiaxed solidification, crystals sediment and form a so called packed bed. The transition from the sedimenting crystals to the packed ones is referred to as coherency point, the stage were individual crystals first impinge their neighbors. The behavior of separated moving crystals can be described by a submerged object approach, whereas the viscoplastic behavior of a semi-solid slurry follows a volume-averaged viscoplastic constitutive equation. The present contribution specially focuses on the transition between the two regimes and discusses the implication that comes from the fact that both approaches decrease in accuracy close to the corresponding border. It is shown that the presumed coherency point can be varied in a certain range without violating either of the two approaches.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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3D Phase-field Simulations of Graphite Growth in Ductile Cast Iron Considering Interaction between Local Expansion and Microsegregation
4D Synchrotron X-ray Quantification of the Cellular to Dendritic Transition
4D Synchrotron X-ray Tomography of Dendritic Microstructure Evolution in a Co Based Alloy during Solidification
An Electron Microscopy Study of Graphite Growth in Nodular Cast Irons
Analytics on Large Microstructure Datasets Using Two Point Statistics: Application to Coarsening Dendritic Solid-Liquid Mixtures
Dendritic Grain Growth Competition in Directional Solidification of Alloys: A Phase-field Study
Discovery of New Grain Refiners Utilizing Crystallographic Data
Effect of Crystal Orientation Relationships on Lamellar Eutectic Solidification Microstructures
Effect of Solidification Parameters and Alloying Elements on Graphite Morphology in Ni-C Alloys
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Evolution of Microstructure in Directionally Solidified Compacted Graphite Iron
Fluid Flow and Its Influence on Crystal Growth Kinetics in Undercooled Melts
Four Dimensional Real-time Studies of Metal Solidification under External Fields
In-situ Imaging of Metallic Alloy Solidification Dynamics for Advanced Manufacturing
In-situ Observation of Multiple Equiaxed Dendrite Interaction under Reduced Gravity Conditions
Influence of Crystal Orientation on the Dynamical Selection of Propagative Cellular Solidification Patterns
Inoculant Undercooling Induced Nucleation and Growth during Equiaxed Solidification: Effect of Location and Separation Distance of the Inoculants and Time
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Investigation of the Metatectic Reaction in Boron Containing Steels
Lattice Boltzmann GPU Solutions for Alloy Microstructure Development and Solute Transport
Mechanisms of Surface Stability in Al-Zn Coated Steel
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Quantitative Phase-Field Crystal Model for Coarsening in Pb-Sn Solid-Liquid Mixtures
Real-time Study on Microstructure Evolution of a Three-phased Eutectic System in Quasi-2D Samples
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