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Application of laser-arc hybrid welding of steel for low-temperature service
Norwegian University of Science and Technology, Trondheim, Norway.
Norwegian University of Science and Technology, Trondheim, Norway; SINTEF Industry, Trondheim, Norway.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-4265-1541
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2019 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 102, no 5-8, p. 2601-2613Article in journal (Refereed) Published
Abstract [en]

Laser-arc hybrid welding (LAHW) is more often used in shipbuilding and oil and gas industries in recent years. Its popularity arises due to many advantages compared to conventional arc welding processes. The laser beam source is used to achieve much higher penetration depths. By adding filler wire to the process area, by means of an arc source, the mechanical properties can be improved, e.g. higher toughness at low temperatures. Therefore, LAHW is a perspective process for low-temperature service. Applicability of LAHW is under concern due to process stability and mechanical properties related to heterogeneous filler wire distribution through the whole weld metal in deep and narrow joints. This can cause reduced mechanical properties in the weld root as well as problems with solidification cracking. The fast cooling rate in the root provides hard and brittle microconstituents lowering toughness at low temperatures. Numerical simulations and experimental observations showed that an increase in heat input from the laser beam is an effective way to reduce the cooling rate, which is also possible by applying preheating.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 102, no 5-8, p. 2601-2613
Keywords [en]
Laser beam, Hybrid welding, Microstructure, Toughness, Numerical simulation
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73054DOI: 10.1007/s00170-019-03304-1ISI: 000469002200116Scopus ID: 2-s2.0-85061037205OAI: oai:DiVA.org:ltu-73054DiVA, id: diva2:1292291
Note

Validerad;2019;Nivå 2;2019-06-20 (johcin)

Available from: 2019-02-27 Created: 2019-02-27 Last updated: 2019-06-20Bibliographically approved

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Frostevarg, JanKaplan, Alexander

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