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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 tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0003-4265-1541
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0002-3569-6795
2019 (engelsk)Inngår i: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 102, nr 5-8, s. 2601-2613Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Springer, 2019. Vol. 102, nr 5-8, s. 2601-2613
Emneord [en]
Laser beam, Hybrid welding, Microstructure, Toughness, Numerical simulation
HSV kategori
Forskningsprogram
Produktionsutveckling
Identifikatorer
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
Merknad

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

Tilgjengelig fra: 2019-02-27 Laget: 2019-02-27 Sist oppdatert: 2019-06-20bibliografisk kontrollert

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Totalt: 73 treff
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