Pure shear stress reversal on a Cu-based bulk metallic glass reveals a Bauschinger-type effect

Yong Hao Sun; D. V. Louzguine-Luzgin; S. Ketov; A. L. Greer

doi:10.1016/j.jallcom.2013.11.104

Pure shear stress reversal on a Cu-based bulk metallic glass reveals a Bauschinger-type effect

Yong Hao Sun, D. V. Louzguine-Luzgin, S. Ketov, A. L. Greer

Advanced Institute for Materials Research (AIMR)

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

12 Citations (Scopus)

Abstract

We have developed a torsion machine that can apply pure shear stress to small-diameter rod samples. We report preliminary results on Cu-based metallic glass samples held at constant torque in the elastic range. The inelastic angle of twist increases approximately linearly with the logarithm of time, interpreted as anelastic deformation. Reversal of torque reveals an effect analogous to the Bauschinger effect in polycrystalline metals. The relative deformation rate is increased by a factor of 4.5 on first reversal, an effect discussed in terms of the operation of shear transformation zones and related to structural change in the metallic glass.

Original language	English
Pages (from-to)	S75-S78
Journal	Journal of Alloys and Compounds
Volume	615
Issue number	S1
DOIs	https://doi.org/10.1016/j.jallcom.2013.11.104
Publication status	Published - 2014 Dec 5

Keywords

Anelasticity
Bauschinger effect
Mechanical properties
Metallic glasses
Torsion

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10.1016/j.jallcom.2013.11.104

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title = "Pure shear stress reversal on a Cu-based bulk metallic glass reveals a Bauschinger-type effect",

abstract = "We have developed a torsion machine that can apply pure shear stress to small-diameter rod samples. We report preliminary results on Cu-based metallic glass samples held at constant torque in the elastic range. The inelastic angle of twist increases approximately linearly with the logarithm of time, interpreted as anelastic deformation. Reversal of torque reveals an effect analogous to the Bauschinger effect in polycrystalline metals. The relative deformation rate is increased by a factor of 4.5 on first reversal, an effect discussed in terms of the operation of shear transformation zones and related to structural change in the metallic glass.",

keywords = "Anelasticity, Bauschinger effect, Mechanical properties, Metallic glasses, Torsion",

author = "Sun, {Yong Hao} and Louzguine-Luzgin, {D. V.} and S. Ketov and Greer, {A. L.}",

note = "Funding Information: The authors thank A.W. Rayment for design of the torsion rig and M.A. Carpenter for access to RUS. The research is funded by the Engineering and Physical Sciences Research Council, UK (Materials World Network project) and by the WPI-AIMR, Tohoku University. Y.H. Sun acknowledges support from a China Scholarship Council (CSC) scholarship. Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

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doi = "10.1016/j.jallcom.2013.11.104",

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AU - Sun, Yong Hao

AU - Louzguine-Luzgin, D. V.

AU - Ketov, S.

AU - Greer, A. L.

N1 - Funding Information: The authors thank A.W. Rayment for design of the torsion rig and M.A. Carpenter for access to RUS. The research is funded by the Engineering and Physical Sciences Research Council, UK (Materials World Network project) and by the WPI-AIMR, Tohoku University. Y.H. Sun acknowledges support from a China Scholarship Council (CSC) scholarship. Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2014/12/5

Y1 - 2014/12/5

N2 - We have developed a torsion machine that can apply pure shear stress to small-diameter rod samples. We report preliminary results on Cu-based metallic glass samples held at constant torque in the elastic range. The inelastic angle of twist increases approximately linearly with the logarithm of time, interpreted as anelastic deformation. Reversal of torque reveals an effect analogous to the Bauschinger effect in polycrystalline metals. The relative deformation rate is increased by a factor of 4.5 on first reversal, an effect discussed in terms of the operation of shear transformation zones and related to structural change in the metallic glass.

AB - We have developed a torsion machine that can apply pure shear stress to small-diameter rod samples. We report preliminary results on Cu-based metallic glass samples held at constant torque in the elastic range. The inelastic angle of twist increases approximately linearly with the logarithm of time, interpreted as anelastic deformation. Reversal of torque reveals an effect analogous to the Bauschinger effect in polycrystalline metals. The relative deformation rate is increased by a factor of 4.5 on first reversal, an effect discussed in terms of the operation of shear transformation zones and related to structural change in the metallic glass.

KW - Anelasticity

KW - Bauschinger effect

KW - Mechanical properties

KW - Metallic glasses

KW - Torsion

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JF - Journal of Alloys and Compounds

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ER -

Pure shear stress reversal on a Cu-based bulk metallic glass reveals a Bauschinger-type effect

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Keywords

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