At present, metals and fiber composite structures are usually joined by adhesive (gluing) or mechanical (e.g. riveting ) methods. These two coupling techniques produce an overlapping join which has a negative effect on the mechanical properties, weight, and height of the integral component. A high susceptibility to contact corrosion occurs especially when aluminum and carbon fiber are paired.
Bremen's DFG research group "Schwarz Silber" has developed several methods to join aluminum with a fiber composite laminate (carbon fiber), saving space and weight. The transition between the materials lies in a transition zone in which titanium is applied as a transition material. If titanium is welded to the aluminum in a loop, fiber rovings can be led through the loops and then brought into final shape with a resin matrix. Another method fabricates a composite of titanium and fiber laminates, which enables welding on the metal side, and laminating on the fiber side. This invention is now being further developed and brought to application in the scope of a funded research project. Manufacturing has been successful on a laboratory scale, so that material tests are now in progress.
ADVANTAGES AND APPLICATIONS
Aerospace industry, car manufacturing
Hybrid component, CFRP aluminum, composite component, lightweight design
Licensing, cooperation and further development
Faserinstitut Bremen e.V., BIAS Bremer Institut für angewandte Strahltechnik, IWT - Leibnitz-Institut für Werkstofforientierte Technologien