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The penetration efficiency of thick plate laser-arc hybrid welding
Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-4265-1541
Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2018 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 97, no 5-8, p. 2907-2919Article in journal (Refereed) Published
Abstract [en]

Double-sided fiber laser-arc hybrid welding was used to join 45 mm thick high strength steel over a wide range of parameters in order to investigate the efficiency of the process. Air gap size, I- and Y-groove type preparation, pulsed and cold metal transfer pulsed arc modes, arc-laser setup, and travel speeds were compared, and in all cases, sufficient filler material was provided to fully fill the gap. The welds were investigated using high speed imaging and cross-sectional analysis to identify penetration depths, morphology, and imperfections. Larger joint air gaps were found to contribute most to weld penetration depth. Surprisingly, increased line energy decreased penetration efficiency in most cases. The laser-arc interdistance was also investigated, revealing an arc size and melt flow dependency for achieving higher penetration depth for a leading arc. It was found that, although penetration can be optimized, solidification cracking can be a limiting factor in the application of deep penetration hybrid welding for thick steel section joining.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 97, no 5-8, p. 2907-2919
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-68842DOI: 10.1007/s00170-018-2103-xISI: 000436813500101Scopus ID: 2-s2.0-85047177358OAI: oai:DiVA.org:ltu-68842DiVA, id: diva2:1209195
Note

Validerad;2018;Nivå 2;2018-07-24 (inah)

Available from: 2018-05-22 Created: 2018-05-22 Last updated: 2018-08-08Bibliographically approved

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Frostevarg, JanKaplan, Alexander

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