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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Materials Research in Reduced Gravity
Presentation Title Effect of Inert Gas Atmosphere on Evaporation Losses and Density Measurement for Electromagnetically Levitated Superalloys
Author(s) Jannatun Nawer, Stéphane Gossé, Michael P SanSoucie, Douglas Matson
On-Site Speaker (Planned) Jannatun Nawer
Abstract Scope Mass evaporation changes the composition of alloys during melting and annealing affecting their final product performance. The use of inert gas significantly reduces the evaporation, so a mathematical model based on Langmuir’s equation was developed to track mass loss of each species in the alloy composition during the measurement of thermo-physical properties in ISS-EML. Two Ni-based super alloys, CMSX-10 and LEK-94 were investigated to predict the dynamic mass loss and track the potential for composition shifts throughout each thermal cycle. Conducting experiments in an inert shielding-gas environment virtually eliminates composition shifts (less than 1%) due to differential relative evaporation and the composition is maintained within the desired limits. Knowledge of the activities of the various species of these alloys as a function of temperature increases the accuracy of density measurements because dynamic mass is now known.
Proceedings Inclusion? Planned: Publication Outside of TMS

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

An Overview of a Proposed NASA Flight Experiment on W-heavy Glass-forming Alloy Composites
Chill-cooling of D2 Tool Steel Under Reduced Gravity Conditions
Comparison of Three-dimensional in situ Observations and Phase-field Simulations of Microstructure Formation during Directional Solidification of Transparent Alloys Aboard the ISS
Computational Fluid Dynamics Modeling of Oscillation Damping of Compound Liquid Droplets
Containerless Measurement of Thermophysical Properties of Ni-based Superalloys LEK94, MC2 and CMSX-10 in the Liquid Phase on Board the International Space Station
Crystallizations Kinetics of Glass-forming ZrCu-based Alloys
Current and Future Experiment Capabilities On-board the ISS for Materials Sciences
Dendrite Orientation Transition of fcc-Al in Bulk Al-Ge Alloys
Effect of Convection on Co-Si Solidification Pathway: Insights from Advanced Photon Source Synchrotron XRD
Effect of Inert Gas Atmosphere on Evaporation Losses and Density Measurement for Electromagnetically Levitated Superalloys
Effects of Oxygen Partial Pressure on the Surface Tension of Liquid Aerospace Alloys
Experiment Preparation and Operation of the Electromagnetic Levitator EML on the ISS
In-situ Dynamics of Hybrid Eutectic Growth Front Morphologies: the Transparent Alloys Project
Kinetics of Solidification in Glass Forming Alloys Under Microgravity Conditions
Measurement of Diffusion Coefficients of Dopants in Ge and Si Melts
Metastable Phase Formation in Peritectic Systems Under Terrestrial and Reduced Gravity Conditions
Modeling Magnetohydrodynamics in Microgravity Electromagnetic Levitation Experiments
Modelling Liquid Droplet Oscillation and Laminar Damping in Reduced Gravity Conditions
Nucleation Fronts Growing in Al-Ni Melts Under Reduced Gravity
Numerical Modeling of Columnar to Equiaxed Transition During Directional Solidification of Al-7wt%Si Alloys in Reduced Gravity
Pattern Formation in Bulk Al-Al2Cu Eutectics: Results from a Recent Microgravity Experiment
Space for Science: ESA’s Microgravity Research Programme on Materials Science
The Enthalpy Method as an Alternative to Accurately Predicting Undercooled Solidification
Thermo-physical Properties of Fe-Si Alloys under Microgravity
Thermophysical Properties of Bulk Metallic Glasses Measured in the Liquid Phase on Board the International Space Station
Thermophysical Properties of SiGe Melts Measured on Board the ISS
Viscosity Measurement of Liquid Alloys in Microgravity and Experiment Parameters Optimization

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