Manufacturing Technology 2013, 13(4):526-530 | DOI: 10.21062/ujep/x.2013/a/1213-2489/MT/13/4/526

Influence of Laser Welding Aluminium Alloy on Mechanical Properties of Welded Joints

Miroslav Sahul, Milan Turňa, Jana ©ugárová, Martin Sahul
Slovak University of Technolgy in Bratislava, Faculty of Materials Science and Technology, Bottova 25, 917 24 Trnava, Slovakia

Paper deals with the analysis of aluminium alloy welded joints produced by disk laser. Naturally hardenable Al alloy type AW 7075, 2.5 mm in thickness was suggested as welded material. Welded joints were produced by use of disk laser type TruDisk 4002 with 1.03 μm wavelength and maximum power P = 2.0 kW. Welded joints were fabricated with different parameters. Laser power varied within interval from 1.6 to 1.7 kW and welding speed was invariable 30 mm/s. Welding was performed without the use of filler metal. Laser light cable in diameter Ø 400 μm (spot diameter Ø 748 μm) was used. Welding was performed with Ar shielding gas with 10 l/min flow rate. Also root protection was provided with an inert gas (Ar). The focal length was f = 200 mm. Laser beam was focused under the surface of welded material. Evaluation of fabricated welds was carried out by use of light microscopy, microhardness measurement across the boundary of welded joints and static tensile test.

Keywords: laser welding, disk laser, aluminium alloy AW 7075, natural aging, quality control of welds

Published: December 1, 2013  Show citation

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Sahul M, Turňa M, ©ugárová J, Sahul M. Influence of Laser Welding Aluminium Alloy on Mechanical Properties of Welded Joints. Manufacturing Technology. 2013;13(4):526-530. doi: 10.21062/ujep/x.2013/a/1213-2489/MT/13/4/526.
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