| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals IV
|
| Presentation Title |
Nucleation in Undercooled Melt upon Changes in the Electromagnetic Stirring |
| Author(s) |
Gwendolyn P. Bracker, Stephan Schneider, Juergen Brillo, Georg Lohoefer, Robert W. Hyers |
| On-Site Speaker (Planned) |
Gwendolyn P. Bracker |
| Abstract Scope |
Electromagnetic levitation (EML) experiments provide access to undercoolings, similar to the undercooling that has been observed on the boundaries of continuous casting. Undercooling near the meniscus can increase the incidence of meniscus hooks which in turn entrap inclusions and increase defects present in castings. Current work is exploring nucleation events in undercooled melts that may have been caused by electromagnetic stirring- which is often used in continuous casting. During experiments in the ISS-EML facility, molten samples, held at a constant temperature, were levitated for several minutes before the sample solidified. Experiments were conducted in 2020 to investigate additional solidification phenomena in which a step change to the electromagnetic field was applied to the sample, intended to induce surface oscillations; instead, the sample solidified. The recent experiments confirmed this nucleation event several times using a zirconium-nickel sample. It is hypothesized that the nucleation is caused by electromagnetically-driven flow in the sample. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Other, Other |