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Please use this identifier to cite or link to this item: http://dspace.lib.cranfield.ac.uk/handle/1826/7328

Document Type: Article
Title: Interaction time and beam diameter effects on the conduction mode limit
Authors: Assuncao, Eurico D.
Williams, Stewart W.
Yapp, David
Issue Date: 2012
Citation: Eurico Assuncao, Stewart Williams and David Yapp. Interaction time and beam diameter effects on the conduction mode limit. Optics and Lasers in Engineering, Volume 50, Issue 6, June 2012, Pages 823-828
Abstract: Laser welding has two distinctive modes: keyhole and conduction mode. Keyhole mode is characterized by deep penetration and high welding speeds, while conduction mode has higher quality welds with no defects or spatter. This study focuses on the transition from conduction to keyhole mode by increasing power density and using different beam diameters and interaction times. Based upon the results it was possible to evaluate that there is a transition mode between conduction and keyhole mode. The results show that the transition between conduction and keyhole mode is not defined by a single power density value. This transition has a range of power densities that depend on the beam diameter and on the interaction time. This study allows the identification of the power density that limits conduction mode, based on parameters such as beam diameter and interaction time instead of a single power density value independent of these parameters.
URI: http://dx.doi.org/10.1016/j.optlaseng.2012.02.001
Appears in Collections:Staff publications - School of Applied Sciences

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