| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
Containerless Solidification of Al-22.5wt%Cu in Reduced Gravity Using the ISS-EML |
| Author(s) |
Jonas Valloton, Sven C Vogel, Hani Henein |
| On-Site Speaker (Planned) |
Jonas Valloton |
| Abstract Scope |
A hypoeutectic Al-22.5wt%Cu sample was processed using the Electro-Magnetic Levitator on board of the International Space Station within the frame of the European Space Agency project NEQUISOL. Several solidification cycles were carried out, with the last cycle yielding a primary undercooling of 20 K and a eutectic undercooling of 35 K. After being returned to Earth, preliminary investigation of the surface of the sample showed unexpected features. The growth direction of the visible dendrites seemed to differ from the characteristic <100> expected of primary α-Al. Furthermore, two distinct eutectic morphologies were observed: a typical lamellar eutectic, as well as an undulated structure, akin to what is formed in rapidly solidified eutectic Al-33wt%Cu droplets. Additional non-destructive techniques will be used: neutron diffraction for phase analysis and X-ray tomography for microstructure evaluation. Then a full metallographic analysis will be performed using optical and electron microscopy and Electron BackScattered Diffraction. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Solidification, |