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MM: Fachverband Metall- und Materialphysik

MM 38: Structural materials

MM 38.3: Talk

Wednesday, April 2, 2014, 10:45–11:00, IFW B

High Strength Light-Metal composites — •Juliane Scharnweber¹, Jan Romberg², Andy Eschke¹, Carl-Georg Oertel¹, Tom Marr², Jens Freudenberger², Ludwig Schultz², Ilya Okulov², Uta Kühn², Jürgen Eckert², and Werner Skrotzki¹ — ¹Institut für Strukturphysik, Technische Universität Dresden, D-01062 Dresden, Germany — ²Leibniz-Institut für Festkörper- und Werkstoffforschung, D-01171 Dresden, Germany

Ti/Al laminated sheets were produced by accumulative roll bonding (ARB) at ambient temperature. Intermediate annealing was found to be suitable to overcome the issue of layer-crossing shear band formation usually observed for comparable metal combinations. This treatment resulted in composite sheets of technically relevant size with layer stability down to thicknesses of about 2 *m. The microstructure and local texture was characterized by scanning electron microscopy combined with electron backscatter diffraction, while the global texture was measured by neutron diffraction. Strength and ductility were measured in tension. The evolution of microstructure, texture and strength is described and discussed with regard to number of ARB cycles and annealing temperature. Additionally, the formation of intermetallic phases at the interfaces is addressed.