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A two-dimensional axially-symmetric model of keyhole and melt pool dynamics during spot laser welding

Published online by Cambridge University Press:  18 April 2013

M. Courtois ,
M. Carin ,
P. Le Masson  and
S. Gaied
M. Courtois
Affiliation:
ArcelorMittal Global R&D Montataire, France. e-mail: mickael.courtois@univ-ubs.fr LIMATB Université de Bretagne-Sud Lorient, France
M. Carin
Affiliation:
LIMATB Université de Bretagne-Sud Lorient, France
P. Le Masson
Affiliation:
LIMATB Université de Bretagne-Sud Lorient, France
S. Gaied
Affiliation:
ArcelorMittal Global R&D Montataire, France. e-mail: mickael.courtois@univ-ubs.fr
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Abstract

For a better understanding of the physical phenomena associated with the appearance of defects in laser welding, a heat and fluid flow model is developed using Comsol Multiphysics®. This first step of the project is focused on the modeling of a static laser shot on a sample of steel. This 2D axially-symmetric configuration is used to study the main physical phenomena related to the creation of the keyhole. This model takes into account the three phases of the matter: the vaporized metal, the liquid phase and the solid base. To track the evolution of these three phases, coupled equations of energy and momentum are solved. The liquid/vapor interface is tracked using the Level-Set method. The calculated velocity and free surface deformation are analyzed. Melt pool shapes are compared with experimental macrographs and the influence of some parameters such as laser power is discussed.

Keywords

Laser weldingkeyholevaporporositieslevel-setmelt pool
Type
Research Article
Information
Metallurgical Research & Technology , Volume 110 , Issue 2 , 2013 , pp. 165 - 173
Copyright
© EDP Sciences 2013

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