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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Materials Research in Reduced Gravity
Presentation Title Influence of Convection on the Dendrite/Eutectic Growth Velocity in Cu-Zr Alloys (project MULTIPHAS)
Author(s) Stefanie Koch, Jan Gegner, Peter Galenko, Markus Rettenmayr, Dieter Herlach
On-Site Speaker (Planned) Peter Galenko
Abstract Scope Cu-Zr exhibits a relatively high glass-forming ability and thus is frequently used as basis for multicomponent bulk metallic glasses (BMGs). The binary system Cu-Zr is a model-system to understand the structure and properties of BMGs. Using an electromagnetic levitation technique we study the solidification behavior during equiaxed growth employing a wide range of initial undercoolings. The eutectic concentration of the Cu56Zr44 alloy leads to simultaneous solidification of two phases in contrast to single phase dendritic solidification of the intermetallic compound Cu50Zr50. The influence of convective flow on solidification of eutectic systems has been demonstrated earlier. For identifying the influence of convection on the growth velocity, parabolic flight experiments were carried out under reduced gravity conditions. Measurements of the growth velocity versus undercooling in the environment of reduced gravity are compared with those measured in the Earth laboratory. This work is supported by the DLR Space Management within project MULTIPHAS.
Proceedings Inclusion? Planned: A print-only volume


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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