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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Materials Research in Reduced Gravity
Presentation Title Dynamics of Microstructure Formation in 3D Directional Solidification of Transparent Model Alloys under Microgravity: Analysis of the Primary Spacing Evolution
Author(s) Jorge Pereda, Fatima Lisboa Mota, Nathalie Bergeon, Younggil Song, Damien Tourret, Jean-Marc Debierre, Rahma Guerin, Alain Karma, Rohit Trivedi, Bernard Billia
On-Site Speaker (Planned) Jorge Pereda
Abstract Scope To study the dynamical formation of 3D arrays of cells and dendrites under diffusive growth conditions, in situ monitoring of directional solidification experiments on a transparent model alloy was carried out under low gravity in the Directional Solidification Insert of the Device for the Study of Critical Liquids and Crystallization (DECLIC-DSI) on-board the International Space Station. Microgravity environment provides the conditions to get homogeneous patterns over the whole interface corresponding to homogeneous values of control parameters. Sequences of the microstructure formation and primary spacing evolution are presented. These analyses reveal two main parameters that strongly affect the mechanisms of spacing selection. First, the critical influence of the macroscopic interfacial curvature that induces pattern gliding is highlighted. Secondly, small crystal misorientations found between the principal crystal axes and the thermal gradient axis also induce drift of specific characteristics which are presented and analyzed in terms of spacing selection and sub-boundary dynamics.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Review on Thermophysical Property Measurements of Liquid Metallic Drops on Parabolic Flights, Texus Rocket Flights and the International Space Station
Analysis of a Rotating Magnetic Field on the THM growth of CZT in Microgravity
Analysis of Particle Engulfment Dynamics during Solidification
Coarsening of Dendrites in Solid-Liquid Mixtures: The Low Volume Fraction Limit.
Crystal Nucleation and Growth from Levitated Aqueous Solutions Using Electrostatic Levitation
Dendritic Growth Kinetics in Undercooled Melts of Pure Fe under Static Magnetic Fields
Dynamics of Eutectic Solidification Patterns in Diffusive Conditions
Dynamics of Microstructure Formation in 3D Directional Solidification of Transparent Model Alloys under Microgravity: Analysis of the Primary Spacing Evolution
Effect of Thermal Drift on the Initial Transient Behavior in Directional Solidification of a Bulk Transparent Model Alloy
Electromagnetic Levitation Processing on the International Space Station
Evaluation of the MICAST#2-12 Al-7wt%Si Sample Directionally Solidified Aboard the International Space Station
Growth Morphology and Velocity of Undercooled Fe-B Alloys under Different Fluid Flow Conditions
In Situ Investigation of the Effects of Gravity Level Variations on the Directional Solidification Microstructures during Parabolic Flights
Influence of Convection on the Dendrite/Eutectic Growth Velocity in Cu-Zr Alloys (project MULTIPHAS)
Installation and Operation of the Electromagnetic Levitator EML on ISS and Experiment Preparation
Metallic Liquid Structures, Properties, and Phase Transitions – Ground-Based Studies for ISS Experiments
Metastable Phase Formation from Undercooled Melt in Peritectic Systems under Terrestrial and Microgravity Conditions: Fe-Co vs. Ti-Al
Microstructure Evolution in Undercooled Al-Fe Melts
Modeling of Gravitational Effects on Particle Settling and Shape Distortion During Liquid-Phase Sintering of Tungsten Heavy Alloys
Numerical Simulation of the Oscillation and Damping of Core-Shell-Structured Iron-Slag Droplets for the Measurements of Surface Tension and Viscosity in Reduced Gravity
Phase-field Modeling of Cellular and Dendritic Microstructure Formation during Directional Solidification of Binary Alloys under Diffusive Growth Conditions: Dynamical Selection of the Primary Spacing
Rapid Quench in an Electrostatic Levitator
Reduced-gravity Measurements of the Effect of Oxygen on Properties of Zirconium
Simulation of Shrinkage-induced Segregation in Multicomponent Multiphase Alloys during Reduced-gravity Solidification
Thermophysical and Kinetic Properties of Fe60Cr21Ni19 - Measurements under Reduced Gravity Conditions

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