About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Research in Reduced Gravity
|
Presentation Title |
Metastable Phase Formation in Peritectic Systems Under Terrestrial and Reduced Gravity Conditions |
Author(s) |
Olga Shuleshova, Wolfgang Löser, Thomas Volkmann, Douglas M. Matson |
On-Site Speaker (Planned) |
Olga Shuleshova |
Abstract Scope |
Formation of the metastable body-centred cubic phase has been observed in different eutectic and peritectic alloy systems. The time it takes to nucleate a second, thermodynamically stable, phase of densely packed structure is found to be strongly depended on the initial solidification conditions. Comparative experiments on earth and under reduced gravity have proven that at least in eutectic systems intensive stirring in the melt during solidification facilitates the nucleation of the secondary phase. Here we present the most recent results of such investigations for two peritectic systems, Ti-Al and Fe-Co, processed in electromagnetic levitator. Different levels of the melt convection are attained in reduced gravity experiments which comprise the parabolic flight campaigns and experiments on board of the International Space Station. The presented work is a part of the ongoing activities under the projects MAGNEPHAS and PARSEC funded by DLR and ESA, and NASA funded ELFSTONE project. |
Proceedings Inclusion? |
Planned: Publication Outside of TMS |