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

L. Wang, Z. P. Lu, T. G. Nieh^*

^*Corresponding author for this work

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

37 Citations (Scopus)

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.

Original language	English
Pages (from-to)	759-762
Journal	Scripta Materialia
Volume	65
Issue number	9
DOIs	https://doi.org/10.1016/j.scriptamat.2011.07.022
Publication status	Published - Nov 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Elevated temperature
Metallic glasses
Nanoindentation
Onset of yielding
Shear band nucleation

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title = "Onset of yielding and shear band nucleation in an Au-based bulk metallic glass",

abstract = "Nanoindentation tests were performed on an Au49Ag 5.5Pd2.3Cu26.9Si16.3 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. {\textcopyright} 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

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

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note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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T1 - Onset of yielding and shear band nucleation in an Au-based bulk metallic glass

AU - Wang, L.

AU - Lu, Z. P.

AU - Nieh, T. G.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/11

Y1 - 2011/11

N2 - Nanoindentation tests were performed on an Au49Ag 5.5Pd2.3Cu26.9Si16.3 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.

AB - Nanoindentation tests were performed on an Au49Ag 5.5Pd2.3Cu26.9Si16.3 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.

KW - Elevated temperature

KW - Metallic glasses

KW - Nanoindentation

KW - Onset of yielding

KW - Shear band nucleation

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U2 - 10.1016/j.scriptamat.2011.07.022

DO - 10.1016/j.scriptamat.2011.07.022

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 65

SP - 759

EP - 762

JO - Scripta Materialia

JF - Scripta Materialia

IS - 9

ER -

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

Abstract

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Research Keywords

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