Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Version 1 : Received: 22 February 2021 / Approved: 23 February 2021 / Online: 23 February 2021 (19:06:04 CET)

How to cite: Buttazzoni, M.; Zenz, C.; Otto, A.; Gómez Vázquez, R.; Liedl, G.; Arias, J.L. Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap. Preprints 2021, 2021020533 (doi: 10.20944/preprints202102.0533.v1). Buttazzoni, M.; Zenz, C.; Otto, A.; Gómez Vázquez, R.; Liedl, G.; Arias, J.L. Numerical Investigation of Laser Beam Welding of Stainless Steel Sheets with a Gap. Preprints 2021, 2021020533 (doi: 10.20944/preprints202102.0533.v1).

Abstract

Keyhole laser beam welding (LBW) of stainless steel sheets with a gap in between is numerically simulated with a three-dimensional, transient multi-physical model for laser material processing. At 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, where a given set of weld seam quality criteria is fulfilled by iteratively optimizing a secondary laser beam, is shown. The relatively coarse mesh, in combination with a good model calibration to 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.

Subject Areas

laser beam welding; welding with gap; keyhole dynamics; pore formation; multiphysical simulation; CFD; process optimization; mesh refinement

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.