| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
Morphological Stability of Eutectic Growth Patterns: In-situ Experiments in Microgravity with the Transparent Alloys Apparatus |
| Author(s) |
Silvere Akamatsu, Sabine Bottin-Rousseau, Mathis Plapp, Ulrike Hecht, Victor T Witusiewicz |
| On-Site Speaker (Planned) |
Silvere Akamatsu |
| Abstract Scope |
Eutectic solidification patterns basically exhibit composite, rod-like or lamellar morphologies. Complexity arises from the dependence of their stability in size and shape both on the control parameters and the solidification path. Moreover, how a morphological transition from lamellae to rods, and the reverse, can occur in a given system still remains largely unknown. We shall review the observations made during the SEBA and SETA campaigns using the Transparent Alloys apparatus onboard the ISS. In situ experiments in model transparent alloys with real-time monitoring in a microgravity environment, along with numerical simulations, represent a unique means for studying diffusion controlled growth phenomena without convection. The main results concern 1- the propagative nature of the lamellar-to-rod transition, with clear information on the precursory instability mode and the coexistence of lamellar and rod domains; 2- the effect of a velocity ramp on the arrangement and size of rod-like patterns during directional solidification. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Modeling and Simulation, |