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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Applications of Solidification Fundamentals
Presentation Title 3D Phase-field Simulations of Graphite Growth in Ductile Cast Iron Considering Interaction between Local Expansion and Microsegregation
Author(s) Janin Eiken, Bernd Böttger
On-Site Speaker (Planned) Janin Eiken
Abstract Scope The solidification of multicomponent ductile cast iron (Fe-C-Si-Mn-Mg) was simulated on the microstructure scale using the Micress multi-phase-field model extended by a new solver which considers volumetric expansion. Thermodynamic and diffusion data were evaluated by online coupling to the Calphad database TCFE8. The simulations were performed in three dimensions to correctly handle the critical volume-to-length ratios. During initial solidification, dendritic austenite and graphite nodules grow as a divorced eutectic. Whenever a graphite nodule gets into direct contact with the austenite, it becomes rapidly encapsulated and isolated from the melt. The subsequent growth of this nodule is then controlled by interstitial diffusion of carbon through the austenitic shell. During this indirect eutectic transition, the volumetric expansion of the graphite causes a pushing of the enveloping austenitic shell, i.e. a local transport of Fe as well as solute atoms. This mechanism has been found to significantly affect growth kinetics and microsegregation.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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
Effects of Rare Earth Oxides on the Precipitation of Graphite in Fe-C-Si Alloy
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
Investigating Homogenous Nucleation in Solidification of Aluminum and Iron by Molecular Dynamics Simulations
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
Microstructural Development During Thin Film Solidification: Comparison of Experiments and Simulations
Microstructure Characteristics of A356 Nanocomposites Manufactured via Ultrasonic Cavitation Processing under Controlled Solidification Conditions
Nucleation of Solidification in Confined High Aspect Ratio Films
On the Solidification Kinetics of Metal Alloys: A Study Using 3-D Phase Field Modeling and Synchrotron X-ray Image Techniques
On the Transition from Equiaxed Sedimentation to Viscoplastic Packed Bed Dynamics
Pattern Formation during Directional Solidification of the Ternary Eutectic Alloy Al-Ag-Cu under Influence of Velocity Changes
Pattern Formation during In-variant Three-phase Eutectic Growth
Pattern Formation during the Directional Solidification of Ternary Eutectic Alloys and the Influence of the Average Front Undercooling
Phase Field Modelling of Snowflakes Growth
Quantifying Dendritic Evolution in Mg Alloys Using In Situ Synchrotron Tomography
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
Scandium Effect on Undercooling and Dendrite Morphology of Al–4.5 wt.%Cu Droplets
Solidification Characteristics of CNTs/Mg Composite with Ultrasonic
Spheroidal Graphite Growth Studied by Synchrotron X-ray Tomography
Thermal Analysis of Cu-Cu2O Eutectic
Thermomechanical Properties of Metals during Solidification by Molecular Dynamics Simulations
Three Dimensional Eutectic Colony Morphologies in Multi-component, Multi-phase Alloys
Using Synchrotron X-ray Radiography to Measure the Statistics of Intermetallic Compound (IMC) Selection and Growth during Solidification

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