Surface Treatment to Promote Joining of Glass Fiber Reinforced Plastic and AZ31 Magnesium Alloy for Fiber Metal Laminates via Hot Metal Pressing

Abstract:

When fabricating fiber metal laminates, the joining between the metal sheet and the composite is affected by the chemical and mechanical properties at the interface. To this end, this study investigated the influence of different induced-surface characteristics of AZ31B magnesium alloy sheets when joint with glass fiber reinforced polyamide 6. The treatments, carried out to modify the AZ31B surfaces, were annealing, sandblasting, and their combination. The mechanical and chemical interlocking at the metal-composite interface was assessed in terms of macroscopic and microscopic defects as well as lap shear strength. The obtained results indicated that the joint effectiveness was mainly affected by the annealing treatment, which induced both a chemical and morphological modification of the surface. The formed oxide layer at the interface, combined with surface topography modification, were capable to increase the lap shear strength up to 87%.

• Periodical: Key Engineering Materials (Volume 883)
• Pages: 111-118
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.883.111
• Online since: April 2021
• Authors: Lucia Lizzul*, Marco Sorgato, Andrea Ghiotti, Stefania Bruschi
• Keywords: Fiber Metal Laminate, Magnesium Alloy, Surface Treatment

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