| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microgravity studies of peritectic coupled growth by using
a transparent model alloy aboard the International Space Station
|
| Author(s) |
Johann Mogeritsch, Andreas Ludwig |
| On-Site Speaker (Planned) |
Johann Mogeritsch |
| Abstract Scope |
Peritectic alloys form eutectic-like microstructures under
certain conditions, with both the pro-peritectic and peritectic phases growing isothermal from
the melt. This so-called peritectic coupled growth (PCG) is significantly
affected by convection, so in-situ directional solidification studies were performed
on a transparent model alloy using a Bridgman furnace aboard the International
Space Station. PCG was also observed for a hypo-peritectic alloy, x = 0.57,
close to the peritectic plateau (x ≤ 0.54), for process conditions where
both phases solidify planarly. This was conditional on the formation of both
phases and the complete contact of the peritectic phase with the forming melt
during the melting of the model substance in the adiabatic zone. The peritectic
phase became the preferred phase during the solidification experiment, but the
metastable pro-peritectic phase formed again when the pulling of the sample
was stopped. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Phase Transformations, |