Role of surface structures on long term stability of adhesive joints between Ti–15V–3Cr–3Sn–3Al and polyether-ether-ketone

Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints

“…A similar effect was confirmed for three laser pretreated aluminum alloys, i.e., AW 6022-T4, Aural5 and AW 7003-T5, bonded with the epoxy adhesive BETAMATE 1486 [23]. The positive effect of the laser pretreatment on the mechanical properties of hydrothermally aged specimens is also reported in further studies [6,14].…”

“…Therefore, surface pretreatments such as, for example, grit blasting, etching, anodization, as well as plasma-or ablative laser treatments are carried out depending on the material and the application [5,11]. The surface structuring, on the one hand, causes a surface enlargement that enhances the number of suitable chemical binding sites, and on the other hand, allows mechanical interlocking between the two materials as a complementary bonding mechanism [9,10,[12][13][14].…”

“…New, fast and environmentally benign pretreatment methods are needed to widen the use of structural adhesive bonding in future lightweight solutions. The laser pretreatment offers the potential to increase the mechanical performance and mediaresistance of adhesive bonds for different adherents and adhesives [14,[16][17][18][19][20][21]. For example, Alfano et al studied the influence of grit blasting and laser pretreatment of AW 6082-T6 bonded with a Hysol 9466 epoxy adhesive on the peel strength and concluded that the maximum peel force and displacement of the laser pretreated samples increased significantly [18].…”

“…The main reasons for this increased performance are considered to be the cleaning of the metal surface from contaminations and the surface structuring with micro-and nanostructures. The elucidation of the role of the structuring for the active bonding mechanisms as well as for the improvement in aging resistance and mechanical performance of the joints, however, is often very difficult [9,14,24,25].…”

Transferability of the Structure–Property Relationships from Laser-Pretreated Metal–Polymer Joints to Aluminum–CFRP Hybrid Joints

“…In prior studies on metal-polymer joints that were adhesively bonded after laser surface pretreatments, it was commonly assumed that besides the removal of surface contaminations, the surface enlargement and the morphology of the micro-and nanostructures generated by the laser were responsible for a further increase in mechanical strength and resistance against hydrothermal aging of the joints [12][13][14][15]. While several studies can be found that investigate the structure-property relationships of metal-polymer adhesive joints, further research is needed to reveal if the same relationships can be found in metalfiber-reinforced plastic hybrid adhesive joints.…”