Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session
MM 18.39: Poster
Montag, 31. März 2014, 18:00–20:00, P4
Effect of shear localization on atomic transport and mechanical damping in a Pd40Ni40P20 bulk metallic glass — •Isabelle Binkowski1, Igor S. Golovin2, Sergiy V. Divinski1, and Gerhard Wilde1 — 11- Institut für Materialphysik, Universität Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany — 22- Technological University 'MISiS', Leninsky ave.4, 119049 Moscow, Russia
Bulk metallic glasses feature beneficial properties which are promising for applications, because of which they have received 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. The plastic deformation is localized in thin regions, called shear bands, with widths from 10nm to 50 nm, whose extension lead to catastrophic failure. Despite their obvious importance, there exist several open issues concering the initiation, propagation, kinetics and general comprehension of shear banding. In the present study, the characteristics of shear bands in a Pd40Ni40P20 bulk metallic glass are investigated more precisely utilizing the radiotracer technique to measure atomic transport in shear bands. Additionally, combining these experimental results with calorimetric measurements and a mechanical spectroscopy study gives insight into the time-dependence and the impact of structural changes on diffusion and damping capability of the metallic glass.
Financial support of DFG and RFBR (project 13-03-91330/13) are acknowledged.