Onset of yielding and shear band nucleation in an Au-based bulk metallic glass

L. Wang; Z. P. Lu; T. G. Nieh

doi:10.1016/j.scriptamat.2011.07.022

Onset of yielding and shear band nucleation in an Au-based bulk metallic glass

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

34 Scopus Citations

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Author(s)

L. Wang
Z. P. Lu
T. G. Nieh

Detail(s)

Original language	English
Pages (from-to)	759-762
Journal / Publication	Scripta Materialia
Volume	65
Issue number	9
Publication status	Published - Nov 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2011.07.022 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-80052818227&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(b8023ace-b9bd-49f4-a8a3-03becbd0a408).html

Abstract

Nanoindentation tests were performed on an Au₄₉Ag _5.5Pd_2.3Cu_26.9Si_16.3 metallic glass. The critical shear stress for the first pop-in, i.e. the onset of yielding, was measured at different temperatures. The volume and the activation free energy for the shear transformation zones were determined from the stress-temperature relationship. The strain-rate dependence of serrated flow in nanoindentation was also characterized. The sizes of shear band nucleus at different temperatures were found to be practically constant. The implication of a constant nucleus size is discussed. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

Elevated temperature, Metallic glasses, Nanoindentation, Onset of yielding, Shear band nucleation

Bibliographic Note

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