Phase change problem and effects of geometrical constants on weld pool geometry in sheet metal laser welding

    Authors

    U. Tanriver; J. Longobardi; W. P. Latham;A. Kar

    Comments

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    Abbreviated Journal Title

    Sci. Technol. Weld. Join.

    Keywords

    Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

    Abstract

    A three-dimensional quasi-state heat conduction Model is presented for the solid/liquid interface in laser welding of thin sheet metals. The vapour plasma phone effect is incorporated into the model by, considering the electromagnetic field equation to determine the laser power reaching the substrate surface after passing through the phone region. Optical properties, such as the dielectric constant and electrical conductivity of phone, and the thermal conductivity of the vapour of stainless steel 316 in the plume region were estimated Elliptic-paraboloid weld pool geometry is considered and analytic expressions for temperature distributions are obtained in the solid and liquid regions based on the weld pool geometry. Experimental and theoretical results for the weld depths and widths arc illustrated for process parameters such as the laser power, welding speed, and weld pool shape factors in x and y directions. (C) 2002 IoM Communications Ltd.

    Journal Title

    Science and Technology of Welding and Joining

    Volume

    7

    Issue/Number

    1

    Publication Date

    1-1-2002

    Document Type

    Article

    Language

    English

    First Page

    27

    Last Page

    33

    WOS Identifier

    WOS:000174753100004

    ISSN

    1362-1718

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