| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
In-situ Investigation of the Impact of Gravity on CET during Directional Solidification of Al-Cu Alloys |
| Author(s) |
Guillaume Reinhart, Fabiola Ngomesse, Lara Abou-Khalil, Gerhard Zimmermann, David J. Browne, Wilhelmus Sillekens, Henri Nguyen-Thi |
| On-Site Speaker (Planned) |
Guillaume Reinhart |
| Abstract Scope |
During industrial processes such as casting, welding or additive manufacturing, a transition between a columnar grain structure and an equiaxed grain structure is often observed. The so-called Columnar-to-Equiaxed Transition (CET) has a major impact on the mechanical properties and lifetime of metal parts. Gravity is the cause of many phenomena such as natural convection and buoyancy that impede the understanding of the solidification process, and specifically the CET. X-radiography has become a powerful technique to investigate the microstructure formation dynamics in metal alloys, and especially gravity-induced effects that are transient phenomena. The present communication will provide an overview of results obtained by in-situ observation of directional solidification experiments carried out on Al–Cu alloys. Two microgravity platforms were used: parabolic flights and sounding rockets. The comparative analysis with ground-based experiments will enlighten the impact of gravity-related effects during the various steps involved in the CET. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Aluminum, Characterization |