Berlin 2012 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 17: Poster Session

MM 17.13: Poster

Montag, 26. März 2012, 17:00–19:00, Poster B

Investigation of strain fields along shear bands in a deformed Pd40Ni40P20 bulk metallic glass — •Severin Schlottbom, Jonas Bünz, Jörn Leuthold, Stefan Ostendorp, and Gerhard Wilde — Westfälische Wilhelms-Universität Münster, Institut für Materialphysik, Wilhelm-Klemm-Str. 10, 48149 Münster

Plastic deformation of metallic glasses induces shear bands, which form quasi-instantaneously once a critical loading is exceeded. The mechanism of deformation is essential for the mechanical properties of amorphous metals, but not deeply understood yet. The knowledge of strain fields along a single shear band might provide access to understanding the basic deformation mechanism of the shear transformation zones (STZ) forming the shear bands. In this work the initiation of shear bands and their influences on the adjacent unaltered matrix is investigated. Undeformed Pd40Ni40P20 bulk metallic glass was coated with gold nanodots by PVD, delivering a nanoscale grid, which is used to monitor the strain fields during shear deformation. The as-cast and subsequently cold-rolled samples were examined by scanning electron microscopy and digital image correlation is used in order to determine the strain fields.