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Laser Deep Penetration Welding of an Aluminum Alloy with Simultaneously Applied Vibrations

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Abstract

In aluminum welding, the grain structure of produced seams is an essential factor with respect to the seam properties. In the casting technology the effect of mechanical vibrations on the grain growth during the solidification of liquid metals is known as a refinement method. In this paper, the transferability of this approach from comparatively long-time processes in the field of casting to the short-time process of laser deep penetration welding is investigated. Therefore, specimens were sinusoidal vibrated with frequencies up to 4 kHz during bead-on-plate full-penetration welding experiments. The resulting grain size was determined by applying the circular intercept procedure on the center of a cross-section micrograph of each weld. The results show that grain refinement is in general achievable by mechanical vibrations in the audible frequency range during laser full penetration keyhole welding of the aluminum alloy EN AW-5083.

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Acknowledgments

This work was accomplished within the Center of Competence for Welding of Aluminum Alloys (Centr-Al). The authors gratefully acknowledge financial support of this work by the Deutsche Forschungsgemeinschaft (DFG VO 530/85-1: Identifizierung des Einflusses mechanischer Schwingungen auf den Erstarrungsprozess beim Tiefschweißen, in German) and thank exceedingly Florian Schmidt for supporting and supervising the experimental works and Marius Gatzen for his support.

The “BIAS ID” numbers are part of the figures and allow the retraceability of the results with respect to mandatory documentation required by the funding organization.

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Authors and Affiliations

  1. BIAS – Bremer Institut für angewandte Strahltechnik GmbH, Klagenfurter Straße 5, 28359, Bremen, Germany

    Peer Woizeschke, Tim Radel & Frank Vollertsen

  2. requisimus AG, Flandernstraße 96, 73732, Esslingen am Neckar, Germany

    Paul Nicolay

  3. University of Bremen, Klagenfurter Straße 5, 28359, Bremen, Germany

    Frank Vollertsen

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  1. Peer Woizeschke
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  2. Tim Radel
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  4. Frank Vollertsen
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Correspondence to Peer Woizeschke.

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Woizeschke, P., Radel, T., Nicolay, P. et al. Laser Deep Penetration Welding of an Aluminum Alloy with Simultaneously Applied Vibrations. Lasers Manuf. Mater. Process. 4, 1–12 (2017). https://doi.org/10.1007/s40516-016-0032-9

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