Shear banding in metallic glasses described by alignments of Eshelby quadrupoles

Vitalij Hieronymus-Schmidt, Harald Rösner, Gerhard Wilde, and Alessio Zaccone
Phys. Rev. B 95, 134111 – Published 21 April 2017

Abstract

Plastic deformation of metallic glasses performed well below the glass transition temperature leads to the formation of shear bands as a result of shear localization. It is believed that shear banding originates from individual stress concentrators having quadrupolar symmetry. To elucidate the underlying mechanisms of shear-band formation, microstructural investigations were carried out on sheared zones using transmission electron microscopy. Here we show evidence of a characteristic signature present in shear bands manifested in the form of sinusoidal density variations. We present an analytical solution for the observed postdeformation state derived from continuum mechanics using an alignment of quadrupolar stress-field perturbations for the plastic events. Since we observe qualitatively similar features for three different types of metallic glasses that span the entire range of characteristic properties of metallic glasses, we conclude that the reported deformation behavior is generic for all metallic glasses, and thus has far-reaching consequences for the deformation behavior of amorphous solids in general.

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  • Received 15 August 2016
  • Revised 30 March 2017

DOI:https://doi.org/10.1103/PhysRevB.95.134111

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Vitalij Hieronymus-Schmidt1, Harald Rösner1,*, Gerhard Wilde1,2, and Alessio Zaccone3,4

  • 1Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany
  • 2Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
  • 3Department of Chemical Engineering and Biotechnology, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA Cambridge, United Kingdom
  • 4Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, CB3 9HE Cambridge, United Kingdom

  • *Corresponding author: rosner@uni-muenster.de

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Issue

Vol. 95, Iss. 13 — 1 April 2017

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