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Laser Beam Welding of 6013 Aluminum Alloy Sheet

Braun, R. and Roth, G. and Wittwer, W. (2001) Laser Beam Welding of 6013 Aluminum Alloy Sheet. EUROMAT 2001, Rimini, Italien, 10.06. - 14.06.2001.

Full text not available from this repository.

Abstract

Butt welds of 1.6 mm thick sheet of the Al-Mg-Si-Cu alloy 6013 were produced using a 3 kW Nd-Yag laser. The sheet was welded in the T4 temper using filler powders of the alloys AL-5%Mg and Al-12%Si. Microstructure, hardness profiles, tensile properties and the corrosion behavior of the welds were investigated in the as-welded condition and after a post-weld heat treatment to the T6 temper. Metallographic sections of the joints revealed a dendritic microstructure exhibiting pores in the fusion zone and a partially melted zone adjacent to the fusion boundary. In the hardness profiles across the weld, minima were observed in the centre of the fusion zone. Strengths of the joints in the as welded T4 condition were 70 and 85 % of the ultimate tensile strength of the base material 6013-T4, using filler alloys Al-5%Mg and Al-12%Si, respectively. Post-weld artificial aging to the T6 temper increased the strengths of the welds made with the filler powders Al-5%Mg and Al-12%Si, approaching 75 and 90 %, respectively, of the ultimate tensile strength of the base material 6013-T6. After immersion in an aqueous chloride/peroxide solution, coupons of welds in the as welded T4 condition were more severely attacked by pitting and intergranular corrosion than the base material 6013-T4, which was found to be susceptible to undermining pitting. When artificially aged to the T6 temper, the welds as well as the parent metal were sensitive to intergranular corrosion, revealing similar depth of corrosion attack.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Laser Beam Welding of 6013 Aluminum Alloy Sheet
Authors:
AuthorsInstitution or Email of Authors
Braun, R.UNSPECIFIED
Roth, G.UNSPECIFIED
Wittwer, W.UNSPECIFIED
Date:2001
Page Range:pp. 1-8
Status:Published
Keywords:laser beam welding, aluminum alloy AA6013, filler powders, microstructure, hardness profiles, joint efficiency, corrosion
Event Title:EUROMAT 2001, Rimini, Italien, 10.06. - 14.06.2001
Organizer:Associazione Italiana di Metallurgia
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Institute of Materials Research
Deposited By: Dr.rer.nat. Hans-Albert Eckel
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 17:48

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