Fracture Morphology of Single-Lap Dissimilar Joints Between Thermoplastic Composite and AA5754-H111 with Laser Ablation Surface Pre-Treatment

Authors : Nahit ÖZTOPRAK, Gökçe Mehmet GENÇER

Pages : 12-21

Doi:10.7212/karaelmasfen.1144918

View : 56 | Download : 52

Publication Date : 2023-06-30

Article Type : Research Paper

Abstract :Hot pressing is successfully proposed to bond metallic and polymeric materials as a direct-joining method to replace conventional assembly techniques. This article reports an experimental investigation on the failure mechanism analysis of single-lap joints insert ignore into journalissuearticles values(SLJs); subjected to tensile-shear loading. Al5754 alloy in H111 condition and long glass fiber reinforced-polypropylene insert ignore into journalissuearticles values(PP); composite are chosen as the adherends. In order to enhance the bond strength, laser processing is applied to the metal surface. A grid texture model by eight consecutive times scanning is utilized for the surface modification. After fabrication of the dissimilar joint, quasi-static mechanical performance of the metal-polymer hybrid structure is elucidated through tensile-shear testing. Thereafter, morphology of the fracture surfaces is evaluated by scanning electron microscopy insert ignore into journalissuearticles values(SEM);. The experimental findings reveal that the laser surface texturing is proved to be an outstanding candidate for achieving strong joints through micro-interlocking in such metal/polymer multi-material connections. The ultimate force reaches the value of 1515.10 N after the 20 W laser surface pre-treatment.
Keywords : Tek bindirmeli bağlantılar, Sıcak presleme, Lazer ile uzaklaştırma işlemesi, Kırılma yüzeyi