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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jones, J. D. C.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2008Pulsed laser micromachining of yttria-stabilized zirconia dental ceramic for manufacturingcitations
- 2005Strain and temperature sensitivity of a single-mode polymer optical fibercitations
- 2005Delivery of nanosecond pulses through hollow core photonic crystal fibres and the associated damage limitationscitations
- 2005Single-mode mid-IR guidance in a hollow-core photonic crystal fibercitations
- 2005Developments towards controlled three-dimensional laser forming of continuous surfacescitations
- 2004Iterative 3D laser forming of continuous surfaces
- 2004Temperature dependence of the stress response of fibre Bragg gratingscitations
- 2003Dynamic distortion measurements during laser forming of Ti-6Al-4V and their comparison with a finite element modelcitations
- 2003Dynamic shape measurement system for laser materials processingcitations
- 2001Real-time, nonintrusive oxidation detection system for the welding of reactive aerospace materials
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article
Real-time, nonintrusive oxidation detection system for the welding of reactive aerospace materials
Abstract
<p>We describe the development of a real-time nonintrusive monitor to detect degradation of a gas shield condition during laser welding by use of on-axis spectrally resolved detection of light emitted from the workpiece. Failure of gas shielding to the point at which there is a risk of contamination from the air is revealed by the marked increase in the intensity of a spectral feature around 426 nm. To avoid unwanted sensitivity to the overall intensity of the radiation, the intensity at 426 nm is normalized by that at 835 nm, where the spectrum is insensitive to gas shielding. We collected the radiation by using the same optics as are used to deliver the processing beam, and thus the detection process is entirely nonintrusive. We demonstrate successful operation for welding stainless steel and titanium under both helium and argon gas shielding. © 2001 Optical Society of America.</p>