Dresden 2009 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 48: Nanostructured Materials IV

MM 48.4: Talk

Friday, March 27, 2009, 11:00–11:15, IFW B

Microstructure and texture evolution during high pressure torsion of a Cu-0.17wt%Zr alloy — •Anahita Khorashadizadeh, Myrjam Winning, and Dierk Raabe — Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany

Investigations of the microstructure of materials processed via severe plastic deformation methods such as high pressure torsion and their recrystallization behavior is of great interest as they are capable of producing ultra fine grained material with good mechanical properties. In this study Cu-0.17wt%Zr has been subjected to high pressure torsion (HPT) with a maximal pressure of 4.8 GPa at room temperature up to shear strains of γ=78. Annealing of the deformed samples was carried out subsequently and microstructure of both the deformed and annealed samples was investigated using a scanning electron microscope and microhardness measurements, in order to analyze the recrystallization behavior of the HPT samples. It will be shown that simple shear texture components represented by A-fiber {111}<uvw> and B-fiber {hkl}<110> were developed during the HPT deformation. After annealing, the ideal shear texture components still exist despite a change in texture intensity. The local orientations of deformed and annealed samples were analyzed using electron back scatter diffraction to obtain information about the recrystallization process.