Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps

S. X. Song; J. S.C. Jang; J. C. Huang; T. G. Nieh

doi:10.1016/j.intermet.2009.11.009

Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps

S. X. Song^*, J. S.C. Jang, J. C. Huang, T. G. Nieh

^*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

Transition from inhomogeneous to homogeneous deformation was characterized in an Au₄₉Ag_5.5Pd_2.3Cu_26.9Si_16.3 metallic glass by compression of micro-scaled pillar samples and morphological observations of deformed specimens. In compression, the transition was revealed as the absence of flow serration in a stress-strain curve. Morphologically, it corresponds to the disappearance of localized shear band and the sample is uniformly deformed. The transition was found to be both temperature and strain rate dependent, and at a higher strain rate, it occurred at a higher temperature. The homogeneous deformation and, in particular the stress overshoot phenomenon, could be described by a shear transition zone model. Based on the current data, deformation maps were developed for the Au₄₉Ag_5.5Pd_2.3Cu_26.9Si_16.3 metallic glass.

Original language	English
Pages (from-to)	702-709
Journal	Intermetallics
Volume	18
Issue number	4
Online published	30 Nov 2009
DOIs	https://doi.org/10.1016/j.intermet.2009.11.009
Publication status	Published - Apr 2010
Externally published	Yes

Research Keywords

B. Deformation map
B. Glasses, Metallic
B. Mechanical properties at high temperatures
B. Plastic deformation mechanisms
F. Mechanical testing

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10.1016/j.intermet.2009.11.009

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title = "Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps",

abstract = "Transition from inhomogeneous to homogeneous deformation was characterized in an Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass by compression of micro-scaled pillar samples and morphological observations of deformed specimens. In compression, the transition was revealed as the absence of flow serration in a stress-strain curve. Morphologically, it corresponds to the disappearance of localized shear band and the sample is uniformly deformed. The transition was found to be both temperature and strain rate dependent, and at a higher strain rate, it occurred at a higher temperature. The homogeneous deformation and, in particular the stress overshoot phenomenon, could be described by a shear transition zone model. Based on the current data, deformation maps were developed for the Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass.",

keywords = "B. Deformation map, B. Glasses, Metallic, B. Mechanical properties at high temperatures, B. Plastic deformation mechanisms, F. Mechanical testing",

author = "Song, {S. X.} and Jang, {J. S.C.} and Huang, {J. C.} and Nieh, {T. G.}",

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T1 - Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps

AU - Song, S. X.

AU - Jang, J. S.C.

AU - Huang, J. C.

AU - Nieh, T. G.

PY - 2010/4

Y1 - 2010/4

N2 - Transition from inhomogeneous to homogeneous deformation was characterized in an Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass by compression of micro-scaled pillar samples and morphological observations of deformed specimens. In compression, the transition was revealed as the absence of flow serration in a stress-strain curve. Morphologically, it corresponds to the disappearance of localized shear band and the sample is uniformly deformed. The transition was found to be both temperature and strain rate dependent, and at a higher strain rate, it occurred at a higher temperature. The homogeneous deformation and, in particular the stress overshoot phenomenon, could be described by a shear transition zone model. Based on the current data, deformation maps were developed for the Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass.

AB - Transition from inhomogeneous to homogeneous deformation was characterized in an Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass by compression of micro-scaled pillar samples and morphological observations of deformed specimens. In compression, the transition was revealed as the absence of flow serration in a stress-strain curve. Morphologically, it corresponds to the disappearance of localized shear band and the sample is uniformly deformed. The transition was found to be both temperature and strain rate dependent, and at a higher strain rate, it occurred at a higher temperature. The homogeneous deformation and, in particular the stress overshoot phenomenon, could be described by a shear transition zone model. Based on the current data, deformation maps were developed for the Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass.

KW - B. Deformation map

KW - B. Glasses, Metallic

KW - B. Mechanical properties at high temperatures

KW - B. Plastic deformation mechanisms

KW - F. Mechanical testing

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U2 - 10.1016/j.intermet.2009.11.009

DO - 10.1016/j.intermet.2009.11.009

M3 - RGC 21 - Publication in refereed journal

SN - 0966-9795

VL - 18

SP - 702

EP - 709

JO - Intermetallics

JF - Intermetallics

IS - 4

ER -

Inhomogeneous to homogeneous transition in an Au-based metallic glass and its deformation maps

Abstract

Research Keywords

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