Berlin 2015 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 20: Liquid and Amorphous Metals III: Deformation of Metallic Glasses

MM 20.3: Vortrag

Dienstag, 17. März 2015, 10:45–11:00, H 0107

Investigation of kinetics and strain fields in shear bands of a Pd40Ni40P20 bulk metallic glass — •Isabelle Binkowski, Sergiy Divinski, and Gerhard Wilde — Institut für Materialphysik, Universität Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany

Bulk metallic glasses feature beneficial properties which are promising for applications, because of which they have reached increasing attention. Metallic glasses exhibit mechanical properties such as high strength and hardness, however, this advantage is impeded by the fact that their plasticity appears to be extremely limited. At temperatures well below the glass transition, the plastic deformation is localized in thin regions, called shear bands, with widths from 5 nm to 50 nm, whose continued activation leads to a catastrophic failure. In the area of research on shear bands, several important questions are still open, as e.g. concerning the initiation, propagation, kinetics of shear banding as well as concerning the intrinsic properties of these thin plate-like regions. In the present study, the mechanism of shear banding in a Pd40Ni40P20 bulk metallic glass was investigated in detail. The investigation focuses on the kinetic and structural properties of the shear bands in this highly stable bulk metallic glass by the use of various experimental techniques.