A Modeling Study On The Influence Of Pulse Shaping On Keyhole Laser Welding

    Authors

    P. S. Mohanty; A. Kar;J. Mazumder

    Comments

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    Abbreviated Journal Title

    J. Laser Appl.

    Keywords

    laser welding; keyhole; pulse shaping; mathematical modeling; TYPE-304 STAINLESS-STEEL; POOL DEVELOPMENT; GTA; Materials Science, Multidisciplinary; Optics; Physics, Applied

    Abstract

    A theoretical analysis describing the effects of pulse shaping on keyhole laser welding is presented. Calculation of the keyhole profile and melt pool dimensions was performed by the balancing of surface fortes and energy at the liquid-vapor and solid-liquid interfaces in three dimensions. The effect of temporal pulse shape on weld dimensions has been examined over a range of power densities, pulse times and pulse frequencies. Several pulse types (e.g., top-hat, Gaussian, ramp-up and ramp-down pulses) have been considered, Pulse shaping showed significant effect on the weld dimensions, The predicted width and penetration depth of welds with ramp-up and ramp-down pulse shapes were greater than those obtained with Gaussian and top-hat pulses, The theoretical predictions have been compared with experimental data. Furthermore, the response of two different materials with considerably different physical properties (stainless steel and aluminum) has been analysed.

    Journal Title

    Journal of Laser Applications

    Volume

    8

    Issue/Number

    6

    Publication Date

    1-1-1996

    Document Type

    Article

    Language

    English

    First Page

    291

    Last Page

    297

    WOS Identifier

    WOS:A1996VY92100006

    ISSN

    1042-346X

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