Title

Effects of phase changes on weld pool shape in laser welding

Authors

Authors

W. Pecharapa;A. Kar

Comments

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Abbreviated Journal Title

J. Phys. D-Appl. Phys.

Keywords

MODEL; BEAM; Physics, Applied

Abstract

A mathematical model is developed to relate the weld depth and width to the laser parameters. The model is based on the Stefan condition for quasi-steady state laser welding. Simple expressions are obtained for the shapes of the solid-liquid and liquid-vapour interfaces. They are found as functions of the laser irradiance, welding speed, absorptivity and thermal diffusivity. Simple expressions for the temperature distributions in the liquid and solid phases are also presented. The results for the weld depths and widths and the temperature distributions in the workpiece are illustrated for various laser intensities and welding speeds. The predictions of this simple model are found to compare well with experimental data and other previous models.

Journal Title

Journal of Physics D-Applied Physics

Volume

30

Issue/Number

24

Publication Date

1-1-1997

Document Type

Article

Language

English

First Page

3322

Last Page

3329

WOS Identifier

WOS:000071532600010

ISSN

0022-3727

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