Influence of Laser Surface Modification on Bonding Strength of Al/Mg Adhesive Joints

Key properties of magnesium alloys, such as the high strength-to-density ratio, are driving the production of lightweight structural components in the automotive and aeronautical industries. Many efforts have been carried out on various aspects of processing and fabrication, but the joining of Mg al...

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Bibliographic Details
Published inJournal of adhesion science and technology Vol. 25; no. 11; pp. 1261 - 1276
Main Authors Alfano, M., Ambrogio, G., Crea, F., Filice, L., Furgiuele, F.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Group 01.01.2011
Taylor & Francis
Subjects
Adhesive bonding
Application fields
Applied sciences
EPOXY ADHESIVE
Exact sciences and technology
Joining, thermal cutting: metallurgical aspects
LASER TREATMENT
MAGNESIUM ALLOY
Metals. Metallurgy
Polymer industry, paints, wood
SINGLE-LAP JOINTS
Technology of polymers
Adhesivity
Lap joint
Laser assisted processing
Epoxy resin
Mechanical properties
Shear strength
laser treatment
single-lap joints
Adhesive bonding
Aluminium alloy
Experimental study
Surface treatment
epoxy adhesive
Pulsed laser
Morphology
Adhesive joint
Magnesium alloy
Surface properties
Adhesive
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ISSN0169-4243
1568-5616
DOI10.1163/016942410X533381

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Summary:Key properties of magnesium alloys, such as the high strength-to-density ratio, are driving the production of lightweight structural components in the automotive and aeronautical industries. Many efforts have been carried out on various aspects of processing and fabrication, but the joining of Mg alloys to dissimilar materials is a subject which attracted much research interest in the last decades. In the present work a preliminary investigation on the strength of Al/Mg (AA6082/AZ31B) single-lap epoxy bonded joints was carried out. To this aim, Mg and Al substrates were laser irradiated using a pulsed ytterbium fiber laser. For comparison, and in order to estimate the beneficial action of the laser surface treatment, single lap joints with grit-blasted substrates were prepared and tested. The interaction between laser treated surfaces and two different epoxy adhesives was also analyzed. Finally, the results and discussion were supported by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) executed on treated and post-failure sample surfaces.
ISSN:0169-4243
1568-5616
DOI:10.1163/016942410X533381