Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Christian Nowroth
  • Jan Grajczak
  • Andreas Schmelt
  • Sarah Nothdurft
  • Jens Twiefel
  • Jörg Hermsdorf
  • Stefan Kaierle
  • Jörg Wallaschek

External Research Organisations

  • Laser Zentrum Hannover e.V. (LZH)
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Details

Original languageEnglish
Article number106954
JournalUltrasonics
Volume131
Early online date16 Feb 2023
Publication statusPublished - May 2023

Abstract

The constantly increasing demands on components and their resource-efficient production require new strategies in modern process chains. The Collaborative Research Centre (CRC) 1153 “Tailored Forming” is working on the production of hybrid solid components made from joined semi-finished products with subsequent forming. Laser beam welding with ultrasonic assistance has proven to be advantageous in the production of semi-finished products due to the active influence on the microstructure as a result of the excitation. In this work, the feasibility of extending the monofrequency excitation of the melt pool used so far during welding to a multifrequency excitation is investigated. Results from simulations and experiments show that a multi-frequency excitation of the weld pool can be effectively realised. Furthermore, it is shown that a combination of previously separately used excitation methods (positioning of the melt pool in the vibration node and in the vibration antinode, respectively) with two different frequencies is successful and leads to a combination of effects as desired, what can be seen from micrographs.

Keywords

    Laser beam welding, Multifrequency excitation, Ultrasonic excitation

ASJC Scopus subject areas

Cite this

Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding. / Nowroth, Christian; Grajczak, Jan; Schmelt, Andreas et al.
In: Ultrasonics, Vol. 131, 106954, 05.2023.

Research output: Contribution to journalArticleResearchpeer review

Nowroth, C, Grajczak, J, Schmelt, A, Nothdurft, S, Twiefel, J, Hermsdorf, J, Kaierle, S & Wallaschek, J 2023, 'Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding', Ultrasonics, vol. 131, 106954. https://doi.org/10.1016/j.ultras.2023.106954
Nowroth, C., Grajczak, J., Schmelt, A., Nothdurft, S., Twiefel, J., Hermsdorf, J., Kaierle, S., & Wallaschek, J. (2023). Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding. Ultrasonics, 131, Article 106954. Advance online publication. https://doi.org/10.1016/j.ultras.2023.106954
Nowroth C, Grajczak J, Schmelt A, Nothdurft S, Twiefel J, Hermsdorf J et al. Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding. Ultrasonics. 2023 May;131:106954. Epub 2023 Feb 16. doi: 10.1016/j.ultras.2023.106954
Nowroth, Christian ; Grajczak, Jan ; Schmelt, Andreas et al. / Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding. In: Ultrasonics. 2023 ; Vol. 131.
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abstract = "The constantly increasing demands on components and their resource-efficient production require new strategies in modern process chains. The Collaborative Research Centre (CRC) 1153 “Tailored Forming” is working on the production of hybrid solid components made from joined semi-finished products with subsequent forming. Laser beam welding with ultrasonic assistance has proven to be advantageous in the production of semi-finished products due to the active influence on the microstructure as a result of the excitation. In this work, the feasibility of extending the monofrequency excitation of the melt pool used so far during welding to a multifrequency excitation is investigated. Results from simulations and experiments show that a multi-frequency excitation of the weld pool can be effectively realised. Furthermore, it is shown that a combination of previously separately used excitation methods (positioning of the melt pool in the vibration node and in the vibration antinode, respectively) with two different frequencies is successful and leads to a combination of effects as desired, what can be seen from micrographs.",
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AU - Schmelt, Andreas

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AU - Twiefel, Jens

AU - Hermsdorf, Jörg

AU - Kaierle, Stefan

AU - Wallaschek, Jörg

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