Huge reduction of Young's modulus near a shear band in metallic glass

S. V. Ketov; H. K. Nguyen; A. S. Trifonov; K. Nakajima; D. V. Louzguine-Luzgin

doi:10.1016/j.jallcom.2016.06.116

Huge reduction of Young's modulus near a shear band in metallic glass

S. V. Ketov, H. K. Nguyen, A. S. Trifonov, K. Nakajima, D. V. Louzguine-Luzgin

Advanced Institute for Materials Research (AIMR)

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

18 Citations (Scopus)

Abstract

A Zr-based bulk metallic glassy sample was subjected to the mechanical compression test at room temperature. The elastic modulus variation in the surface regions near and far from a shear band with a shear step of about 2 μm was measured using the atomic force microscope (AFM) quantitative nanomechanical mapping method. It was found that Young's modulus decreases gradually towards the shear bands mid-plane on the micrometer scale. Maximum decrease in the Young's modulus near the shear band's central region is about 70% on nanometer scale. Such a huge increase in elasticity close to the central plane of the shear band is attributed to the generation and migration of the excess volume during the shear band operation and possible formation of nanovoids.

Original language	English
Pages (from-to)	221-226
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	687
DOIs	https://doi.org/10.1016/j.jallcom.2016.06.116
Publication status	Published - 2016

Keywords

Bulk metallic glass
Quantitative nanomechanical mapping
Shear band
Young's modulus

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10.1016/j.jallcom.2016.06.116

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title = "Huge reduction of Young's modulus near a shear band in metallic glass",

abstract = "A Zr-based bulk metallic glassy sample was subjected to the mechanical compression test at room temperature. The elastic modulus variation in the surface regions near and far from a shear band with a shear step of about 2 μm was measured using the atomic force microscope (AFM) quantitative nanomechanical mapping method. It was found that Young's modulus decreases gradually towards the shear bands mid-plane on the micrometer scale. Maximum decrease in the Young's modulus near the shear band's central region is about 70% on nanometer scale. Such a huge increase in elasticity close to the central plane of the shear band is attributed to the generation and migration of the excess volume during the shear band operation and possible formation of nanovoids.",

keywords = "Bulk metallic glass, Quantitative nanomechanical mapping, Shear band, Young's modulus",

author = "Ketov, {S. V.} and Nguyen, {H. K.} and Trifonov, {A. S.} and K. Nakajima and Louzguine-Luzgin, {D. V.}",

note = "Funding Information: This work was supported by World Premier International Research Center Initiative (WPI) , MEXT, Japan and by the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST«MISiS» (No K2-2014-013 and K2-2015-073 ) and by Taiho Kogyo Tribology Research Foundation (TTRF). The authors are also thankful to A.L. Greer and his group in the University of Cambridge for useful suggestions. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V. All rights reserved.",

year = "2016",

doi = "10.1016/j.jallcom.2016.06.116",

language = "English",

volume = "687",

pages = "221--226",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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AU - Ketov, S. V.

AU - Nguyen, H. K.

AU - Trifonov, A. S.

AU - Nakajima, K.

AU - Louzguine-Luzgin, D. V.

N1 - Funding Information: This work was supported by World Premier International Research Center Initiative (WPI) , MEXT, Japan and by the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST«MISiS» (No K2-2014-013 and K2-2015-073 ) and by Taiho Kogyo Tribology Research Foundation (TTRF). The authors are also thankful to A.L. Greer and his group in the University of Cambridge for useful suggestions. Publisher Copyright: © 2016 Elsevier B.V. All rights reserved.

PY - 2016

Y1 - 2016

N2 - A Zr-based bulk metallic glassy sample was subjected to the mechanical compression test at room temperature. The elastic modulus variation in the surface regions near and far from a shear band with a shear step of about 2 μm was measured using the atomic force microscope (AFM) quantitative nanomechanical mapping method. It was found that Young's modulus decreases gradually towards the shear bands mid-plane on the micrometer scale. Maximum decrease in the Young's modulus near the shear band's central region is about 70% on nanometer scale. Such a huge increase in elasticity close to the central plane of the shear band is attributed to the generation and migration of the excess volume during the shear band operation and possible formation of nanovoids.

AB - A Zr-based bulk metallic glassy sample was subjected to the mechanical compression test at room temperature. The elastic modulus variation in the surface regions near and far from a shear band with a shear step of about 2 μm was measured using the atomic force microscope (AFM) quantitative nanomechanical mapping method. It was found that Young's modulus decreases gradually towards the shear bands mid-plane on the micrometer scale. Maximum decrease in the Young's modulus near the shear band's central region is about 70% on nanometer scale. Such a huge increase in elasticity close to the central plane of the shear band is attributed to the generation and migration of the excess volume during the shear band operation and possible formation of nanovoids.

KW - Bulk metallic glass

KW - Quantitative nanomechanical mapping

KW - Shear band

KW - Young's modulus

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Huge reduction of Young's modulus near a shear band in metallic glass

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