Title

Effects of phase changes on weld pool shape in laser welding

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.

Publication Date

12-21-1997

Publication Title

Journal of Physics D: Applied Physics

Volume

30

Issue

24

Number of Pages

3322-3329

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0022-3727/30/24/010

Socpus ID

0031383137 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0031383137

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