Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression

H. M. Chen; X. H. Du; J. C. Huang; J. S.C. Jang; T. G. Nieh

doi:10.1016/j.intermet.2008.11.004

Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression

H. M. Chen, X. H. Du, J. C. Huang, J. S.C. Jang, T. G. Nieh

Graduate Institute of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

A ductile phase-separated Zr-based bulk metallic glass (BMG) deformed to different strains at room temperature and low strain rate was characterized. The BMG samples were compressed to nominal strains of 3%, 7%, and 10%, after which the samples were unloaded for morphological observation using scanning electron microscopy. The morphological observation was subsequently used for the interpretation of the measured load-displacement curves. It was found that the BMG exhibited apparent uniform deformation initially (at plastic strain <1%) and, then, visible local shear bands began to developed. Afterwards, a principal shear band was soon developed and dominated the deformation process until fracture. In this study, we also found that the local shear strain varies along the principal shear plane and decreases monotonically from the shear band initiation site.

Original language	English
Pages (from-to)	330-335
Number of pages	6
Journal	Intermetallics
Volume	17
Issue number	5
DOIs	https://doi.org/10.1016/j.intermet.2008.11.004
State	Published - May 2009

Keywords

B. Glasses, metallic
B. Mechanical properties at ambient temperature
B. Plastic deformation mechanisms
F. Mechanical testing

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10.1016/j.intermet.2008.11.004

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title = "Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression",

abstract = "A ductile phase-separated Zr-based bulk metallic glass (BMG) deformed to different strains at room temperature and low strain rate was characterized. The BMG samples were compressed to nominal strains of 3%, 7%, and 10%, after which the samples were unloaded for morphological observation using scanning electron microscopy. The morphological observation was subsequently used for the interpretation of the measured load-displacement curves. It was found that the BMG exhibited apparent uniform deformation initially (at plastic strain <1%) and, then, visible local shear bands began to developed. Afterwards, a principal shear band was soon developed and dominated the deformation process until fracture. In this study, we also found that the local shear strain varies along the principal shear plane and decreases monotonically from the shear band initiation site.",

keywords = "B. Glasses, metallic, B. Mechanical properties at ambient temperature, B. Plastic deformation mechanisms, F. Mechanical testing",

author = "Chen, {H. M.} and Du, {X. H.} and Huang, {J. C.} and Jang, {J. S.C.} and Nieh, {T. G.}",

note = "Funding Information: The authors would like to thank National Science Council of Republic of China for supporting this study, under the grant number NSC95-2218-E-110-006. TGN is supported by the US Department of Energy, Office of Basic Energy Sciences, under contract DE-FG02-06ER46338 with the University of Tennessee. The collaboration with Prof. K.C. Hsieh in National Sun Yat-Sen University and Prof. P.K. Liaw in the University of Tennessee on the ductile phase-separated Zr bulk metallic glasses is gratefully acknowledged.",

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AU - Chen, H. M.

AU - Du, X. H.

AU - Huang, J. C.

AU - Jang, J. S.C.

AU - Nieh, T. G.

N1 - Funding Information: The authors would like to thank National Science Council of Republic of China for supporting this study, under the grant number NSC95-2218-E-110-006. TGN is supported by the US Department of Energy, Office of Basic Energy Sciences, under contract DE-FG02-06ER46338 with the University of Tennessee. The collaboration with Prof. K.C. Hsieh in National Sun Yat-Sen University and Prof. P.K. Liaw in the University of Tennessee on the ductile phase-separated Zr bulk metallic glasses is gratefully acknowledged.

PY - 2009/5

Y1 - 2009/5

N2 - A ductile phase-separated Zr-based bulk metallic glass (BMG) deformed to different strains at room temperature and low strain rate was characterized. The BMG samples were compressed to nominal strains of 3%, 7%, and 10%, after which the samples were unloaded for morphological observation using scanning electron microscopy. The morphological observation was subsequently used for the interpretation of the measured load-displacement curves. It was found that the BMG exhibited apparent uniform deformation initially (at plastic strain <1%) and, then, visible local shear bands began to developed. Afterwards, a principal shear band was soon developed and dominated the deformation process until fracture. In this study, we also found that the local shear strain varies along the principal shear plane and decreases monotonically from the shear band initiation site.

AB - A ductile phase-separated Zr-based bulk metallic glass (BMG) deformed to different strains at room temperature and low strain rate was characterized. The BMG samples were compressed to nominal strains of 3%, 7%, and 10%, after which the samples were unloaded for morphological observation using scanning electron microscopy. The morphological observation was subsequently used for the interpretation of the measured load-displacement curves. It was found that the BMG exhibited apparent uniform deformation initially (at plastic strain <1%) and, then, visible local shear bands began to developed. Afterwards, a principal shear band was soon developed and dominated the deformation process until fracture. In this study, we also found that the local shear strain varies along the principal shear plane and decreases monotonically from the shear band initiation site.

KW - B. Glasses, metallic

KW - B. Mechanical properties at ambient temperature

KW - B. Plastic deformation mechanisms

KW - F. Mechanical testing

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DO - 10.1016/j.intermet.2008.11.004

M3 - 期刊論文

AN - SCOPUS:61749089230

SN - 0966-9795

VL - 17

SP - 330

EP - 335

JO - Intermetallics

JF - Intermetallics

IS - 5

ER -

Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression

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Keywords

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