About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Research in Reduced Gravity
|
Presentation Title |
Influence of Undercooling and Convective Stirring on Phase Transformations in Electromagnetically Levitated Fe-Co |
Author(s) |
Brian Stanford, Olga Shuleshova, Douglas M. Matson |
On-Site Speaker (Planned) |
Brian Stanford |
Abstract Scope |
This work is motivated by a desire to achieve a wholistic understanding of the behavior of undercooled metal alloys to control microstructural evolution during casting processes in both ground and space-based environments. Of appreciable interest is the influence of stirring on phase selection during solidification. The space electromagnetic levitation (ISS-EML) platform onboard the International Space Station provides the unique ability to select a wide range of melt convection conditions while observing transformation kinetics in a containerless manner using high speed video and radiation pyrometry. In Fe-Co alloys, higher undercooling and increased stirring promote nucleation of the stable austenitic phase which forms after primary solidification of the metastable ferrite. The Retained Damage Model (RDM) uses optimized parameters collected from undercooled ground-based electrostatic levitation testing to successfully predict the influence of EML stirring on the incubation time between the two recalescence events. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Modeling and Simulation, High-Temperature Materials |