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Surface analytical characterisation of Nd:YAG-laser pre-treated Al Mg3 as a preparation for bonding

: Langer, M.; Rechner, R.; Thieme, M.; Jansen, I.; Beyer, E.


Solid state sciences 14 (2012), No.7, pp.926-935
ISSN: 1293-2558
Journal Article
Fraunhofer IWS ()
Al Mg3; aluminium; anodisation; bonding; electrochemical impedance spectrometry; energy-dispersive X-ray spectroscopy; laser; oxide layer; scanning electron microscopy; shear strength

The contribution summarises results of the surface pre-treatment of Al Mg3 (EN-AW-5754) for bonding applications. Mainly the sheet samples were irradiated with a pulsed solid-state laser in different atmospheres. Afterwards the pre-treated surfaces were analysed by quantitative topographic measurements, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and electrochemical impedance spectroscopy (EIS). The effect of surface pre-treatment on the strength of adhesively bonded specimens was evaluated by tensile lap-shear strength tests. The results were compared with conventional pre-treatment methods, such as anodic oxidation and others.