About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
First-principle investigation and modeling of airborne acoustic emission mechanisms in selective laser-metal fusion printing processes |
Author(s) |
Haolin Liu, Zhongshu Ren, Jiayun Shao, Anthony Rollett, Tao Sun, Levent Burak Kara |
On-Site Speaker (Planned) |
Haolin Liu |
Abstract Scope |
Process monitoring using airborne acoustic emission, including porosity and melt pool inference, has drawn significant attention in the metallic additive manufacturing (AM) community given its cost-effectiveness and high accessibility. Despite its value, the development of these process monitoring approaches is limited due to the unknowns of their physical mechanisms. To that end, we present our findings, theoretically and experimentally, regarding the mechanisms of airborne acoustic generation during Ti-6Al-4V laser powder bed fusion processes based on a collected multi-modal dataset. Results demonstrate a proportional correlation between acoustic power density and the first-time derivative of keyhole or plume morphological features, which explains most of the previous acoustic-based AM applications. Moreover, a theoretical model is derived using first principle methods to explain the generation process of airborne acoustics, which implies the capability and limits of acoustic-driven monitoring methods. We believe our work contributes knowledge concerning airborne acoustic emission generation to the community. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Process Technology, Modeling and Simulation |