Reversible transition of deformation mode by structural rejuvenation and relaxation in bulk metallic glass

Fanqiang Meng; Koichi Tsuchiya; I. Seiichiro; Yoshihiko Yokoyama

doi:10.1063/1.4753998

Reversible transition of deformation mode by structural rejuvenation and relaxation in bulk metallic glass

Fanqiang Meng, Koichi Tsuchiya, I. Seiichiro, Yoshihiko Yokoyama

Institute for Materials Research (IMR)

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

107 Citations (Scopus)

Abstract

A transition of the deformation mode from heterogeneous, localized deformation to homogeneous deformation was observed in Zr ₅₀Cu ₄₀Al ₁₀ bulk metallic glass (BMG) by giant straining using the high-pressure torsion (HPT) method. The transition is accompanied by a pronounced decrease in hardness and elastic modulus as measured by nanoindentation. Annealing of the deformed BMG resulted in the restoration of the localized deformation, hardness, and elastic modulus; thus, the transition is reversible. The observed reversible transition can be attributed to a change in the local atomic environment in the rejuvenated volume and the relaxed one.

Original language	English
Article number	121914
Journal	Applied Physics Letters
Volume	101
Issue number	12
DOIs	https://doi.org/10.1063/1.4753998
Publication status	Published - 2012 Sep 17

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "A transition of the deformation mode from heterogeneous, localized deformation to homogeneous deformation was observed in Zr 50Cu 40Al 10 bulk metallic glass (BMG) by giant straining using the high-pressure torsion (HPT) method. The transition is accompanied by a pronounced decrease in hardness and elastic modulus as measured by nanoindentation. Annealing of the deformed BMG resulted in the restoration of the localized deformation, hardness, and elastic modulus; thus, the transition is reversible. The observed reversible transition can be attributed to a change in the local atomic environment in the rejuvenated volume and the relaxed one.",

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AU - Yokoyama, Yoshihiko

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AB - A transition of the deformation mode from heterogeneous, localized deformation to homogeneous deformation was observed in Zr 50Cu 40Al 10 bulk metallic glass (BMG) by giant straining using the high-pressure torsion (HPT) method. The transition is accompanied by a pronounced decrease in hardness and elastic modulus as measured by nanoindentation. Annealing of the deformed BMG resulted in the restoration of the localized deformation, hardness, and elastic modulus; thus, the transition is reversible. The observed reversible transition can be attributed to a change in the local atomic environment in the rejuvenated volume and the relaxed one.

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