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MM: Fachverband Metall- und Materialphysik

MM 58: Topical session: X-ray and neutron scattering in materials science III - Real-time insights into fast heat treatment processes using diffraction methods

MM 58.2: Talk

Thursday, April 3, 2014, 16:15–16:30, BAR 205

Texture evolution of YCu deformed by high pressure torsion — •Aurimas Pukenas¹, Andy Eschke¹, Werner Skrotzki¹, Christine Tränkner¹, Jelena Horky², and Michael Zehetbauer² — ¹Institut für Strukturphysik, TU Dresden, Dresden, Germany — ²Fakultät für Physik, Universität Wien, Wien, Austria

YCu is an intermetallic compound with B2 type crystal structure which is ductile at ambient temperature and pressure. Polycrystalline YCu discs were subjected to high pressure torsion (HPT) at a confining pressure of 8 GPa from room temperature up to 300°C. In HPT the deformation of the sample is inhomogeneous along the radial direction. Due to this shear strain gradient, a texture gradient is observed. The texture was measured locally as a function of shear strain by X-ray microdiffraction. The intensity and deviation from the ideal positions of the typical bcc texture components will be discussed and compared to NiAl, another B2 intermetallic compound which is brittle at ambient temperature and pressure conditions.