About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Acoustic Signatures in Metal Laser-powder Bed Fusion |
Author(s) |
Bradley Howell Jared, David Saiz, Matthew Roach, Scott Jensen, Maher Salloum, Constantin Brif, Chase Zimmerman, Elaine Rhoades, Jonathan Pegues |
On-Site Speaker (Planned) |
Elaine Rhoades |
Abstract Scope |
In-situ process monitoring is highly desired within metal additive manufacturing as extensive efforts exist within the community using optical and thermal imaging modalities. Acoustic signatures represent an additional modality being explored in the presented work. Implementation costs for acoustic monitoring are relatively inexpensive compared to optical and thermal methodologies, and high frequency content can be easily accessed. Analyzing acoustic signals presents challenges, however, as individual process events prove difficult to isolate from extraneous disturbances and concurrent process activities. Techniques are being explored in both time and frequency domains to identify specific metal laser-powder bed fusion process events. Progress and challenges from cross-correlation, wavelet and time series pattern discovery methodologies will each be discussed. Anomaly detection for process monitoring is the desired end-goal of this work, so results and future work will all be presented within this context. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |