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Proceedings Paper

Nd:YAG laser welding: an overview
Author(s): Stefanos Karagiannis; George Chryssolouris
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Paper Abstract

Laser welding is used when it is essential to limit the size of the heat-affected zone (HAZ), to reduce the roughness of the welded surface and to eliminate mechanical effects. Solid-state lasers operating in a continuous or pulsed mode can function as welding sources. Present-day lasers can provide vey high levels of power per unit area. The application of solid-state Nd-doped lasers -- such as neodymium-doped yttrium-aluminum-garnet (Nd:YAG) lasers -- in industry verifies the fact that they are reliable, safe to operate, and simple to control. They can emit power in a pulse as high as 107 W or more and can process materials at an extremely high rate. Lasers with high peak power pulses are capable of better material procesing than their average power rating might indicate. High peak power overcomes the thermal diffusivity and reflectivity of precious metals, copper, and aluminum. They can also weld large volumes with a single pulse. In general, increasing lasing efficiency and power is a prerequisite for increased quality and capacity in laser material processing. Nd:YAG laser welding covers a large variety of techniques capable of producing welds in various metals, ranging from a few micrometers to tens of millimeters in thickness. This paper attempts to give an overview of recent developemnts and research trends.

Paper Details

Date Published: 9 April 2003
PDF: 5 pages
Proc. SPIE 5131, Third GR-I International Conference on New Laser Technologies and Applications, (9 April 2003); doi: 10.1117/12.513646
Show Author Affiliations
Stefanos Karagiannis, Univ. of Patras (Greece)
George Chryssolouris, Univ. of Patras (Greece)


Published in SPIE Proceedings Vol. 5131:
Third GR-I International Conference on New Laser Technologies and Applications
Alexis Carabelas; Giuseppe Baldacchini; Paolo Di Lazzaro; Dimitrios Zevgolis, Editor(s)

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