About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
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| Presentation Title |
Hey, this is keyhole pore. Can you hear me? Hello? |
| Author(s) |
Christopher Kube, Tao Sun, Samuel Clark, Allison Beese, Andrea Arguelles, Ian Bacon, Lovejoy Mutswatiwa, Olivia Van Fleet, Sihang Feng |
| On-Site Speaker (Planned) |
Christopher Kube |
| Abstract Scope |
This work presents an acoustic technique for real-time detection, sizing, and localization of keyhole pores during laser powder bed fusion of AlSi10Mg. Three laser optical microphones employing Fabry-Perot interferometers detect the natural resonance modes of the vapor depression. A 1 MHz ultrasonic transducer mounted beneath the sample delivers broadband half-cycle pulses that actively excite the cavity and forcing incipient pores to announce themselves through amplified acoustic signatures. Measurements were conducted at APS 32-ID, where high-speed X-ray imaging synchronized with the acoustics provides direct visualization of keyhole. This enables precise correlation between resonant frequency response and vapor depression dimensions, identifying acoustic signatures associated with keyhole pore pinch-off events. Coupled Flow3D and acoustic modeling supports experimental observations. Results demonstrate quantitative relationships between cavity geometry and acoustic response, revealing distinct frequency shifts as defects acoustically announce their presence during pore formation, providing fundamental insights into acoustic defect detection during additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |