Journal
SCRIPTA MATERIALIA
Volume 66, Issue 5, Pages 231-234Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.10.044
Keywords
Metallic glass; Plasticity; Low temperature; Shear band
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Funding
- Swiss National Science Foundation [SNF-200020-120258]
- Swiss National Science Foundation (SNF) [200020-120258] Funding Source: Swiss National Science Foundation (SNF)
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At cryogenic temperatures bulk metallic glasses can sustain higher plastic strains than at room temperature. This is generally believed to result from an intrinsic shear-band nucleation rate that increases with decreasing temperature. Here we report on inhomogeneous flow operating via a single shear band even at cryogenic temperatures, challenging the presupposition of increased shear-band activity. The results provide a new interpretation of non-serrated flow and explain, via a simple viscosity law, the correspondingly observed strength increase with decreasing temperature. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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