Welding of Automotive Aluminum Alloys by Laser Wobbling Processing

Giuseppe Barbieri; Francesco Cognini; Massimo Moncada; Antonio Rinaldi; Gabriele Lapi

doi:10.4028/www.scientific.net/MSF.879.1057

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Welding of Automotive Aluminum Alloys by Laser...

Welding of Automotive Aluminum Alloys by Laser Wobbling Processing

Abstract:

The scope of this paper is to examine the improvement from laser welding by an innovative beam wobbling head towards the welding of tailored blanks parts, widely used in automotive to develop different stiffness aluminum components. For this purpose, butt joints and overlapping joints were produced from sheets made out of two industrial grades, i.e. AA-6082 T6 and AA-5754 H111 of different thickness. The technique was evaluated both with and without the use of a filler wire (AA-5556). The qualification of the welding process encompassed Non Destructive Testing (NDT) and mechanical testing. The results indicate that butt joints tend to fail within the base material (BM) of sheet with smaller thickness. On the contrary, the shear tests on lap joints highlighted a rupture mode occurring in the heat affected zone (HAZ) of the thin sheet. Remarkably, the wobbling process generally allows avoiding porosity when combined with an optimized set of welding parameters. Yet, a residual porosity was always detected in lap joints, varying with the size of the fused zone.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

1057-1062

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.1057

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Online since:

November 2016

Authors:

Giuseppe Barbieri*, Francesco Cognini, Massimo Moncada, Antonio Rinaldi, Gabriele Lapi

Keywords:

Aluminum, Joining, Laser Welding, Tailored Welded Blank, Wobbling

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* - Corresponding Author

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