Berlin 2008 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 11: Nanostructured Materials III

MM 11.2: Vortrag

Montag, 25. Februar 2008, 15:00–15:15, H 0107

Texture and mechanical anisotropy of ultrafine-grained Al alloys produced by accumulative roll bonding — •Juliane Hüttenrauch¹, Werner Skrotzki¹, Carl-Georg Oertel¹, Heinz-Günter Brokmeier², Heinz Werner Höppel³, and Irena Topic³ — ¹Institut für Strukturphysik, Technische Universität Dresden — ²GKSS Forschungszentrum, Geesthacht — ³Lehrstuhl Allgemeine Werkstoffwissenschaften, Universität Erlangen- Nürnberg

The texture of ultrafine-grained Al alloys produced by accumulative roll bonding (ARB) has been measured by neutron diffraction. The starting texture consists of a strong cube component. During ARB this texture breaks down and a texture typical for rolling of face-centred cubic metals with high stacking fault energy develops. The texture after 8 ARB cycles is characterized by the beta-fibre with the Cu component dominating. Moreover, the rotated cube component forms. This component is typical for simple shear which during rolling takes place in the surface layer of the sheets. Based on the Lankford parameter measured the mechanical anisotropy of the advanced metal sheets will be discussed.