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Evaluating edge joint preparation impact on penetration depth in laser-arc hybrid welding
Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Camino de los Descubrimientos s/n, Sevilla 41092, Spain.
Department of Material and Production, Aalborg University, Fibigerstraede 16, Aalborg 9220, Denmark.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-4265-1541
Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Camino de los Descubrimientos s/n, Sevilla 41092, Spain.
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2025 (English)In: Optics and Laser Technology, ISSN 0030-3992, E-ISSN 1879-2545, Vol. 181, no part A, article id 111592Article in journal (Refereed) Published
Abstract [en]

Nowadays, conventional welding technologies such as submerged arc welding (SAW) are still used in most heavy-steel industries. This type of traditional technology means that welding takes up a large part of the productive time. As a solution to this problem, there are welding methods, such as Laser-Arc Hybrid Welding (LAHW), that have the potential to reduce the cost of manufacturing large steel structures. This is possible due to the reduced number of weld passes required to join thicker steel sections, as large thicknesses can be welded in one or a few passes.

A problem with LAHW is achieving satisfactory quality. For this reason, it is essential to study the starting conditions, e.g. edge joint preparation. The target of this research work is to find out the relationship between the penetration value of the weld bead obtained and the edge joint preparation. The evolution of the molten pool and the behavior of the molten material in the joint is discussed for the different edge joint preparation configurations. The effect of the roughness is that it affects the wetting of the molten material in the joint, which would affect the penetration result, together with the gap and air volume gap used in the joint. Cut-wire is also used in the research, in samples that presented a larger air volume gap. The behavior of the molten metal inside the joint in this case is also discussed. In addition, the quality of the weld beads has also been determined by making macrographs, microstructural analysis, X-ray, microhardness profiles, tensile test and Charpy test. Some pores and cracks have been found, although destructive tests show adequate behavior of the weld bead. It is possible to elucidate from the findings that as the roughness, gap and/or air volume gap of the edge joint increases, the penetration value obtained increases. Cut-wire samples obtained full penetration.

Place, publisher, year, edition, pages
Elsevier Ltd , 2025. Vol. 181, no part A, article id 111592
Keywords [en]
Hybrid welding, Laser-MIG/MAG, Edge joint preparation, Surface roughness, Gap, Air volume gap
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-109756DOI: 10.1016/j.optlastec.2024.111592ISI: 001299941100001Scopus ID: 2-s2.0-85201520537OAI: oai:DiVA.org:ltu-109756DiVA, id: diva2:1895628
Note

Validerad;2024;Nivå 2;2024-09-06 (joosat);

Full text License: CC BY-NC

Available from: 2024-09-06 Created: 2024-09-06 Last updated: 2024-11-20Bibliographically approved

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Frostevarg, Jan

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