Regensburg 2010 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 37: Mechanical Properties II
MM 37.6: Vortrag
Mittwoch, 24. März 2010, 16:00–16:15, H16
Simulation of the in-plane plastic anisotropy of ultrafine grained aluminum sheets produced by accumulative roll bonding — •Benoit Beausir1, Scharnweber Juliane1, Jaschinski Jörn2, Brokmeier Heinz-Günter3, Oertel Carl-Georg1, and Skrotzki Werner1 — 1Institut für Strukturphysik, Technische Universität Dresden, D-01062 Dresden, Germany — 2Institut für Leichtbau und Kunststofftechnik, Technische Universität Dresden, D-01062 Dresden, Germany — 3GKSS Forschungszentrum, Max-Planck-Straße, D-21494 Geesthacht, Germany
Besides grain refinement accumulative roll bonding (ARB) leads to the formation of a texture composed of rolling and shear components. The shear components produced by friction between the rolls and the sheet are found in the surface layers. During subsequent ARB cycles, due to the bonding process the surface shear texture extends into the bulk of the sheet. Eight cycles of ARB were performed on two aluminum alloys, AA1050 and AA6016. The plastic anisotropy was investigated by tensile deformation via Lankford parameter. The global texture of the sheets was measured by neutron diffraction and used as input of the viscoplastic self-consistent model to simulate the in-plane plastic anisotropy. Simulation results are compared with those from experiment and discussed with regard to texture, strain rate sensitivity, grain shape and slip system activity.