Eigenschaften laserstrahlgefügter Mischverbindungen aus Aluminium und Titan in Abhängigkeit der Kantengeometrie und Halbzeugstruktur

This work deals with the laser beam joining of aluminum and titanium as well as the joining of aluminum and CFRP using a titanium laminate edge. The aim was to achieve slim, lightweight and nevertheless high strength joints between these important material groups for use in future applications. The focus hereby is on the influence of the joining zone geometry on the joint strength as well as the failure behavior. The results show that the double-sided laser beam joining process enables based on a derived predictive model the specific targeted design of the titanium edge geometry without significantly influencing the interfacial compound layer properties. Using a wedge-shaped geometry of the titanium part, the failure of the joint could be reliably moved into the heat affected zone of the aluminum. The transfer to titanium laminates and titanium laminate edges shows a high potential of the joining concept for lightweight construction by using aluminum-CFRP joints with titanium transition structures.