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Weldability of Aluminium Alloys for Automotive Applications
RISE - Research Institutes of Sweden, Swerea, Swerea KIMAB.
RISE - Research Institutes of Sweden, Swerea, Swerea KIMAB.
RISE - Research Institutes of Sweden, Swerea, Swerea KIMAB.
2017 (English)In: Physics Procedia, 2017, p. 89-99Conference paper, Published paper (Refereed)
Abstract [en]

Restrictions in CO2-emissions have caused increased demands on decreased weight and increased use of lightweight materials in the automotive industry. Aluminium has shown to be of great interest due to its beneficial weight to strength ratio, and are suitable for hang-on parts such as roof, doors etc. However, the use of aluminium requires reliable joining techniques. This project has been focusing on laser welding of aluminium. It have been reported earlier that hot cracks and porosity are common defects while joining aluminium with laser welding. The aim with this project has been to produce crack free laser welds while joining thin aluminium sheets. Two different optics have been used in this project, oscillating-and triple-spot optics. The results from the experiments show that both the oscillating optics and the triple-spot optics can produce crack free welds. The amount of pores is shown to be low for both cases. The results do also show that the amount of pores in the welds increases with the weld length while the flange length is of minor impact. The mechanical properties are similar for the both optics. The oscillation specimens receive a higher tensile strength while the triple-spot specimens receive a larger elongation at break value. © 2017 The Authors.

Place, publisher, year, edition, pages
2017. p. 89-99
Keyword [en]
Aluminium, Hot cracks, Laser welding, Oscillation, Porosity, Trifocal, Triple-spot, Aluminum, Automotive industry, Cracks, Joining, Laser beam welding, Tensile strength, Welding, Welds, Automotive applications, Elongation at break, Joining techniques, Lightweight materials, Laser materials processing
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33135DOI: 10.1016/j.phpro.2017.08.011Scopus ID: 2-s2.0-85037716611ISBN: 9781510848900 OAI: oai:DiVA.org:ri-33135DiVA: diva2:1179100
Conference
16th Nordic Laser Materials Processing Conference, NOLAMP16 2017, 22 August 2017 through 24 August 2017
Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2018-01-31Bibliographically approved

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