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Holographic visualization of laser-induced plume in pulsed laser welding

โœ Scribed by Sung-Hoon Baik; Seung-Kyu Park; Cheol-Jung Kim; Soo-Yong Kim

Book ID
104159559
Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
517 KB
Volume
33
Category
Article
ISSN
0030-3992

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โœฆ Synopsis

High-speed holographic interferometry was applied to the experimental study of a laser-induced plasma plume in pulsed laser welding. We adopted two kinds of holographic interferometers for visualizing and imaging the refractive index distribution of the plume and vaporized metal; a real-time holographic interferometer with a high-speed camera and a double-pulsed holographic interferometer with a dual-reference-beam module. The high-speed photographs of the weld plume were compared with the visualized images by holographic interferometer. The experimental results show the process of generation and propagation of the laser-induced plume and give the feasibility of quantitative measurement of the density distribution of the laser-induced plume and vaporized metal in laser welding.

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