| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals IV
|
| Presentation Title |
Improving Material Properties Using Contactless Ultrasonic Cavitation |
| Author(s) |
Catherine E H Tonry, Agnieszka Dybalska, Valdis Bojarevics, Georgi Djambazov, William D Griffiths, Koulis Pericleous |
| On-Site Speaker (Planned) |
Catherine E H Tonry |
| Abstract Scope |
Ultrasonic Treatment (UST) of liquid metals has shown great potential for both grain refinement and the degassing of molten metals. Current UST methods use an immersed sonotrode to treat the melt. One of the main problems with this approach, is that contact with the melt can introduce impurities and the sonotrode can also be dissolved. By using a high frequency electromagnetic coil to induce ultrasound in the melt contact can be avoided, while adding heat and mixing. To ensure the resulting pressure waves reach the level required for cavitation it is necessary to tune the system for acoustic resonance. Extensive studies in aluminium, have shown that this technique can produce grain refinement and enhance degassing. Recent work has now demonstrated that castings produced using this method have increased %Elongation and tensile strength. Since there is no contact involved, this contactless sonotrode can be used for high temperature or reactive melts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Process Technology, Modeling and Simulation |