18th INTERNATIONAL CONFERENCE ON ENGINEERING & NATURAL SCIENCES, Girne, Kıbrıs (Kktc), 25 - 29 Kasım 2025, ss.1398-1405, (Tam Metin Bildiri)
Adhesive-based joining
methods are widely used for metal-composite hybrid structures in the defense
and aerospace sectors to meet the demands for lightweight and high strength.
This study investigated the bonding of AA7075-T6 alloy aluminum plate to carbon
fiber-reinforced epoxy matrix composite (CFRP) plates using adhesive film, and
the effects of different surface preparation processes on the interfacial bond
strength. Various mechanical and chemical surface preparation processes, such
as glass-sand blasting, anodizing, and cross-marking, were applied to the
surfaces of the aluminum plates. The CFRP plates were prepared to dimensions in
accordance with the ASTM D1002 standard and then bonded to the aluminum plates
with an epoxy-based adhesive film. Shear tests were applied to the prepared
samples. Precision cutting was then performed for metallographic examination,
and the samples were embedded in Bakelite. Optical microscope analyses were
performed. The results showed that glass-sand blasting and anodizing provided
significantly higher shear strength at the AA7075-T6/CFRP joint interface
compared to other surface preparation methods. However, a significant decrease
in bond strength was observed on cross-ribbed surfaces. The study demonstrates
that AA7075-T6 alloy can be used effectively in high-performance hybrid bonds
with CFRP structures with appropriate surface preparation methods.
Keywords: CFRP, AA7075-T6 , Adhesive, Surface Treatments, Shear
Strength