| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Mechanistic Insights into Ultrasonic Atomization and Grain Refinement Via Cavitation-Induced Shock Waves |
| Author(s) |
Abhinav Priyadarshi, Lukasz Zrodowski, James Broughton, Dmitry Eskin, Iakovos Tzanakis |
| On-Site Speaker (Planned) |
Abhinav Priyadarshi |
| Abstract Scope |
Ultrasonic processing offers a green, sustainable approach for refining metals and generating feedstock particles ideal for additive manufacturing of aluminum alloys. This study elucidates how cavitation-induced shock waves underpin the dual functionality of ultrasound in grain refinement and powder production. Leveraging high-speed optical and X-ray imaging combined with acoustic monitoring, our research reveals that shock waves originating from bubble collapses excite finite-amplitude capillary (Faraday) waves at the liquid-air interface. Wave instability near subharmonic frequencies leads to ligament formation, droplet ejection enabling uniform, defect-free powder generation. Concurrently, similar shock waves and microjets facilitate heterogeneous nucleation and fragmentation of primary intermetallics, thus refining the grain structure of Al alloys. This work enhances fundamental understanding of cavitation effects for both sonofragmentation of grains/dendrites and ultrasonic atomization of liquids, paving the way for transformative additive manufacturing of superior quality aluminum components with tailored microstructures using sustainable processing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, Other |