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Welding of automotive aluminum alloys by laser wobbling processing

TitleWelding of automotive aluminum alloys by laser wobbling processing
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2017
AuthorsBarbieri, Giuseppe, Cognini Francesco, Moncada M., Rinaldi Antonio, and Lapi G.
JournalMaterials Science Forum
Type of ArticleConference paper
KeywordsAluminum, Aluminum components, Automotive aluminum, Butt welding, Different thickness, Heat affected zone, Joining, Joints (structural components), Laser beam welding, Mechanical testing, Non destructive testing, Nondestructive examination, Porosity, Residual porosity, Tailored welded blanks, Welding, Welding parameters, Wobbling

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. © 2017 Trans Tech Publications, Switzerland.


cited By 0; Conference of 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 ; Conference Date: 29 May 2016 Through 3 June 2016; Conference Code:186759

Citation KeyBarbieri20171057