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Finite element simulation of magnesium alloys laser beam welding

Article dans une revue avec comité de lecture
Author
BELHADJ, Asma
BESSROUR, Jamel
BOUHAFS, Mahmoud
ccMASSE, Jean-Eric
211915 Mechanics surfaces and materials processing [MSMP]
BARRALLIER, Laurent

URI
http://hdl.handle.net/10985/8437
DOI
10.1016/j.jmatprotec.2010.02.023
Date
2010
Journal
Journal of Materials Processing Technology

Abstract

In this paper, a three-dimensional finite element model is developed to simulate thermal history magnesium-based alloys during laser beam welding. Space–time temperature distributions in weldments are predicted from the beginning of welding to the final cooling. The finite element calculations were performed using Cast3M code with which the heat equation is solved considering a non-linear transient behaviour. The applied loading is a moving heat source that depends on process parameters such as power density, laser beam dimensions and welding speed, and it is associated to moving boundary conditions. Experiments were carried out to determine temperature evolution during welding and to measure the laser weld width. By comparing the thermal model answers with the measurements, it is found that numerical simulations results are in a good agreement with the experimental data.

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