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Article

A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap

1
Institute of Production Engineering and Photonic Technologies, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
2
AIMEN, Poligono Industrial de Cataboi SUR-PPI-2 (Sector) 2, Parcela 3, E36418 O Porriño, Pontevedra, Spain
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Jean-Pierre Bergmann
Appl. Sci. 2021, 11(6), 2549; https://doi.org/10.3390/app11062549
Received: 19 February 2021 / Revised: 5 March 2021 / Accepted: 9 March 2021 / Published: 12 March 2021
(This article belongs to the Special Issue Modelling of Laser Welding)
Keyhole laser beam welding (LBW) of 304L stainless steel sheets with a gap in between was numerically simulated with a three-dimensional, transient, multi-physical model for laser material processing based on the finite volume method (FVM). First, the model’s ability to reproduce experimental results on a relatively coarse computational mesh within reasonable computing time, so as to serve as process optimization tool, is presented. An example of process optimization is shown, wherein a given set of weld seam quality criteria is fulfilled by iteratively optimizing a secondary laser beam. The relatively coarse mesh, in combination with a good model calibration for the experimental conditions, allows for sufficiently fast simulations to use this approach for optimization tasks. Finally, using a finer spatial and temporal discretization, the dynamic processes in the vicinity of the keyhole leading to the formation of pores are investigated. The physical phenomena predicted by the simulation are coherent with experimental observations found in literature. View Full-Text
Keywords: laser beam welding; welding with gap; keyhole dynamics; pore formation; multiphysical simulation; CFD; FVM; process optimization; mesh refinement; 304L stainless steel laser beam welding; welding with gap; keyhole dynamics; pore formation; multiphysical simulation; CFD; FVM; process optimization; mesh refinement; 304L stainless steel
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MDPI and ACS Style

Buttazzoni, M.; Zenz, C.; Otto, A.; Gómez Vázquez, R.; Liedl, G.; Arias, J.L. A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap. Appl. Sci. 2021, 11, 2549. https://doi.org/10.3390/app11062549

AMA Style

Buttazzoni M, Zenz C, Otto A, Gómez Vázquez R, Liedl G, Arias JL. A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap. Applied Sciences. 2021; 11(6):2549. https://doi.org/10.3390/app11062549

Chicago/Turabian Style

Buttazzoni, Michele, Constantin Zenz, Andreas Otto, Rodrigo Gómez Vázquez, Gerhard Liedl, and Jorge L. Arias 2021. "A Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap" Applied Sciences 11, no. 6: 2549. https://doi.org/10.3390/app11062549

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