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Laser Welding of Aluminium in Automotive Industry
University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
2017 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

With all the advantages aluminium (Al) carries being the light weight and sustainable material, the laser welding of Al is tricky and complicated. The major challenges in laser welding of Al are the hot cracking, porosity and reflectivity. The experiments are done in order to understand the laser welding of Al process and analyse the process parameters impacts. In this thesis work, laser welding of Aluminium alloy is done in order to understand the process parameters effects on the weld quality. Experiments are done on the 5754-H22 and 6082-T6 alloys. Welding speed and laser power is kept constant for the experiments, however, laser focus position is varied on the plates. Focus position is kept on the surface of the plate as well as above and below the surface. The butt welding of same material alloy is done on the 3 mm plates. It is been analyzed that Al alloy 6082-T6 is easier to weld and give better weld quality as compared to 5754-H22. The overlap weld is done on 1.5 mm thick plates with CW (continuous wave) welding and PW (pulse weld). The laser welding is done with high speed, therefore, CW welding shows quality weld with no significant undercut or concavity as compared to PW welding method. The focus position above the surface shows quality weld in overlap weld with both PW and CW welding methods.

Place, publisher, year, edition, pages
2017. , p. 30
Keywords [en]
Laser welding, full penetration, welding speed, focus position
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:hv:diva-12280Local ID: EXP800OAI: oai:DiVA.org:hv-12280DiVA, id: diva2:1204345
Subject / course
Mechanical engineering
Educational program
Maskiningenj├Âr
Supervisors
Examiners
Available from: 2018-05-16 Created: 2018-05-07 Last updated: 2018-05-16Bibliographically approved

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Citation style
  • apa
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  • de-DE
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  • en-US
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  • Other locale
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