Effect of process parameters and adhesive type on Aluminum-Poly Propylene based composite joints made by friction stir weld-adhesive hybrid joining process

Joining of aluminum to polymers and polymer-based composites is important in many industries including automotive and aerospace industries. In this research, joining ofAA5052 aluminum to PP-20%Talc composite using hybrid friction stir-adhesive joining process was investigated. Macrostructural studies showed that penetration of anchor-like aluminum pieces into the composite sheet forms mechanical locks between the base materials. Increasing tool transverse speed resulted in formation of larger anchors.However, more increase in the tool transverse speed resulted in formation of voids and cracks in the stirred zone. Therefore, joints failure load increased (from 255 to 315 N)with increasing tool transverse speed from 50 to 100 mm/min, but then decreased by ~40% when tool transverse speed reached 150 mm/min. Application of adhesive in orderto achieve a hybrid joint caused penetration of anchors inside adhesive layer instead of composite sheet. Therefore, the adhesion force between the composite and the adhesive was found to have a crucial role in determining the joints strength and the methacrylatebased adhesive having better adhesion to the composite sheet, created a hybrid joint with better mechanical properties.

کلیدواژه ها:

Weld-adhesive hybrid joint ، Aluminum AA5052 ، Polypropylene-based composite ، mechanical properties ، macro/micro structure ، methacrylate-based adhesive.