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

材料科學與工程研究所

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

33 引文斯高帕斯（Scopus）

摘要

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.

原文	???core.languages.en_GB???
頁（從 - 到）	702-709
頁數	8
期刊	Intermetallics
卷	18
發行號	4
DOIs	https://doi.org/10.1016/j.intermet.2009.11.009
出版狀態	已出版 - 4月 2010

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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.}",

note = "Funding Information: This work is supported by the US Department of Energy, Office of Basic Energy Sciences. Instrumentation for the nanoindentation work was jointly funded by the Tennessee Agricultural Experiment Station and UT College of Engineering.",

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doi = "10.1016/j.intermet.2009.11.009",

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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.

N1 - Funding Information: This work is supported by the US Department of Energy, Office of Basic Energy Sciences. Instrumentation for the nanoindentation work was jointly funded by the Tennessee Agricultural Experiment Station and UT College of Engineering.

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 - 期刊論文

AN - SCOPUS:77349106901

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

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