Process Stabilization at welding Copper by Laser Power Modulation

Due to their material properties such as high electrical and thermal conductivity, copper materials are more and more demanded for industrial applications. The same material properties make laser welding of copper a challenging task. Laser welds often suffer from defective weld seams with ejections,...

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Bibliographic Details
Published inPhysics procedia Vol. 12; pp. 81 - 87
Main Authors Heider, Andreas, Stritt, Peter, Hess, Axel, Weber, Rudolf, Graf, Thomas
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2011
Subjects
Copper Welding
Ejection
Laser Welding
Power Modulation
Process Stabilization
Spatter
Spatter
Laser Welding
CW
Copper Welding
Process Stabilization
Power Modulation
Ejection
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Summary:Due to their material properties such as high electrical and thermal conductivity, copper materials are more and more demanded for industrial applications. The same material properties make laser welding of copper a challenging task. Laser welds often suffer from defective weld seams with ejections, pores and a large fluctuation in the penetration depth. In this paper the influence of laser power modulation during copper welding on weld imperfections is discussed. It is shown that a sinusoidal power modulation leads to a strong reduction of melt ejections and also to an increase in penetration depth.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2011.03.011