Title

Effects of absorptivity, shielding gas speed, and contact media on sheet metal laser welding

Authors

Authors

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

Comments

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Abbreviated Journal Title

Sci. Technol. Weld. Join.

Keywords

STEEL; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

Abstract

A three-dimensional quasi-steady state heat conduction model is developed for laser welding of sheet metals. The heat flux at the surface of the workpiece is considered to be due to a moving Gaussian laser beam. An analytical expression is obtained for the temperature distribution by solving the conduction problem using the Fourier integral transform technique. this expression is used to locate the melting temperature isotherm, and thereby determine the weld depth and width. Experimental and theoretical results for the weld depths and widths are illustrated for different welding parameters such as the laser power absorptivity, welding speed, and shielding gas speed. The theory and experiment are found to agree reasonably well. The effects of absorptivity, shielding gas speed, and heat loss due to different contact media at the bottom surface of the workpiece are also investigated, and are found to be significant for thin metal laser welding.

Journal Title

Science and Technology of Welding and Joining

Volume

5

Issue/Number

5

Publication Date

1-1-2000

Document Type

Article

Language

English

First Page

310

Last Page

316

WOS Identifier

WOS:000165478000006

ISSN

1362-1718

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