Tech Briefs Magazine - September 2021 - PIT-16

Sensor
Broadband emission
correlated to vapour generation
Droplet transfer cycles
600 kHz
500 kHz
400 kHz
Process zone
References
[1] D. F. Farson, and K. R. Kim: Generation
of optical and acoustic emissions in laser
weld plumes, Journal of Applied Physics
85, 1329 (1999);
[2] M. Bastuck et al.: Überwachung und
Qualitätssicherung des Laser -
schweißprozesses ultrahochfester
Karosseriestähle durch integrierte
ZfPVerfahren, DGZfP-Jahrestagung -
Mi.2.A.4 (2013);
[3] J Shao and Y Yan: Review of techniques
for On-line Monitoring and Inspection of
Laser Welding, Journal of Physics:
Conference Series 15, 101-107 (2005)
200 kHz
100 kHz
80 khz arc
modulation
frequency
0ms
Time
0 kHz
200 ms
Figure 5. Positioning of the Optical Microphone in the Wire Arc AM process (inlay) and the corresponding
acoustic signature of a 200 ms process section.
XARION Laser Acoustics GmbH (Vienna,
Austria). For more information, contact Mr.
Sommerhuber at r.sommerhuber@xarion.com,
or visit http://info.hotims.com/79417-223.
Acknowledgment
The authors gratefully acknowledge the
support from AIMEN Technology Centre
(Spain) and Damon Northeast (Renishaw plc).
[4] S. Everton et al.: Review of in-situ process
monitoring and in-situ metrology for
metaladditive manufacturing, Materials
and Design 95 (2016) 0431-445
[5] Anas Essop, 3D Printing Industry, Dec 10,
2019: https://3dprintingindustry.com/
news/renishaw-launches-infiniam-sonicusing-sound-to-monitor-additivemanufacturing-builds-166213/,
Accessed
June 26, 2020.
[6] M. Bass, Atmospheric Absorption of
Sound, JASA (1990)
[7] Camilo Prieto et al.: In situ process
monitoring by optical microphone for
crack detection in Laser Metal
Deposition applications, measurement
data from AIMEN Technology Centre
(Spain), LANE Conference, industrial
paper entry (2020)
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Tech Briefs Magazine - September 2021

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