| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals
|
| Presentation Title |
Contactless Ultrasound in Copper and Nickel Melts |
| Author(s) |
Catherine E H Tonry, Christopher Beckwith, Valdis Bojarevics, Georgi Djambazov, Koulis Pericleous |
| On-Site Speaker (Planned) |
Catherine E H Tonry |
| Abstract Scope |
Contactless Ultrasound is a novel technique that uses a kilohertz frequency electromagnetic coil, known as “top-coil” to induce rapidly changing Lorentz forces in molten metals. At resonant frequencies these forces are sufficient to induce cavitation within the melt and it has been used to great effect in aluminium melts for grain refinement and degassing. Given the importance of resonance, a three dimensional acoustic/magnetic model of the melt and surrounding crucible has been developed and validated against experiments to predict the optimal conditions for cavitation. In contrast to traditional immersed sonotrode based methods, this contactless ultrasound method has the potential to work with higher temperature or reactive metals. The computational model has been extended to account for copper and nickel melts. Ahead of experiments, the results indicate that resonance, hence cavitation, is achievable in both of these cases using a set up similar to that for aluminium. |
| Proceedings Inclusion? |
Planned: |