Shear band velocity and activation volume during shear deformation by acoustic emission in a Zr-based bulk metallic glass

Sijie Yin; Zhong Wang; Jamieson Brechtl; Hao Zhang; Min Zhang; Jiacheng Han; Zhihua Wang; Junwei Qiao

doi:10.1016/j.jnoncrysol.2023.122767

Shear band velocity and activation volume during shear deformation by acoustic emission in a Zr-based bulk metallic glass

Sijie Yin, Zhong Wang, Jamieson Brechtl, Hao Zhang, Min Zhang, Jiacheng Han, Zhihua Wang, Junwei Qiao

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Abstract

An analysis is presented for the shear band velocity of plastic deformation and activation volume of the shear transformation zone (STZ) in a Zr₆₀Cu₃₀Al₁₀ bulk metallic glass (BMG). Compared to the values calculated by the stick-slip model, the values of shear band velocity calculated after optimization by the acoustic emission technique are much larger than those reported previously. Plastic flow in BMGs is found to be described by a power-law correlation between the maximum velocity of the shear band and the strain rates. Combining the free volume theory and the STZ theory, the relationship between the volume change in the STZ and the shear band velocity is derived as Ω=A(27−lnv/l). The value of A, which is a material dependent constant, is 5.43 × 10⁻³ for the current BMG at room temperature.

Original language	English
Article number	122767
Journal	Journal of Non-Crystalline Solids
Volume	625
DOIs	https://doi.org/10.1016/j.jnoncrysol.2023.122767
State	Published - Feb 1 2024

Funding

Z.W. very much appreciates financial support of the National Natural Science Foundation of China (No. 52201188 ), the Natural Science Foundation of Shanxi Province, China (No. 20210302124423 ), and the Research Project of Shanxi Scholarship Council of China (No. 2022–037 ). J.W.Q. would like to acknowledge the financial support of the National Natural Science Foundation of China (No. 52071229 ).

Funders	Funder number
National Natural Science Foundation of China	52201188
Shanxi Scholarship Council of China	52071229, 2022–037
Natural Science Foundation of Shanxi Province	20210302124423

Keywords

Acoustic emission
Bulk metallic glasses
Shear band velocity
Shear transformation zone

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10.1016/j.jnoncrysol.2023.122767

Cite this

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title = "Shear band velocity and activation volume during shear deformation by acoustic emission in a Zr-based bulk metallic glass",

abstract = "An analysis is presented for the shear band velocity of plastic deformation and activation volume of the shear transformation zone (STZ) in a Zr60Cu30Al10 bulk metallic glass (BMG). Compared to the values calculated by the stick-slip model, the values of shear band velocity calculated after optimization by the acoustic emission technique are much larger than those reported previously. Plastic flow in BMGs is found to be described by a power-law correlation between the maximum velocity of the shear band and the strain rates. Combining the free volume theory and the STZ theory, the relationship between the volume change in the STZ and the shear band velocity is derived as Ω=A(27−lnv/l). The value of A, which is a material dependent constant, is 5.43 × 10−3 for the current BMG at room temperature.",

keywords = "Acoustic emission, Bulk metallic glasses, Shear band velocity, Shear transformation zone",

author = "Sijie Yin and Zhong Wang and Jamieson Brechtl and Hao Zhang and Min Zhang and Jiacheng Han and Zhihua Wang and Junwei Qiao",

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T1 - Shear band velocity and activation volume during shear deformation by acoustic emission in a Zr-based bulk metallic glass

AU - Yin, Sijie

AU - Wang, Zhong

AU - Brechtl, Jamieson

AU - Zhang, Hao

AU - Zhang, Min

AU - Han, Jiacheng

AU - Wang, Zhihua

AU - Qiao, Junwei

PY - 2024/2/1

Y1 - 2024/2/1

N2 - An analysis is presented for the shear band velocity of plastic deformation and activation volume of the shear transformation zone (STZ) in a Zr60Cu30Al10 bulk metallic glass (BMG). Compared to the values calculated by the stick-slip model, the values of shear band velocity calculated after optimization by the acoustic emission technique are much larger than those reported previously. Plastic flow in BMGs is found to be described by a power-law correlation between the maximum velocity of the shear band and the strain rates. Combining the free volume theory and the STZ theory, the relationship between the volume change in the STZ and the shear band velocity is derived as Ω=A(27−lnv/l). The value of A, which is a material dependent constant, is 5.43 × 10−3 for the current BMG at room temperature.

AB - An analysis is presented for the shear band velocity of plastic deformation and activation volume of the shear transformation zone (STZ) in a Zr60Cu30Al10 bulk metallic glass (BMG). Compared to the values calculated by the stick-slip model, the values of shear band velocity calculated after optimization by the acoustic emission technique are much larger than those reported previously. Plastic flow in BMGs is found to be described by a power-law correlation between the maximum velocity of the shear band and the strain rates. Combining the free volume theory and the STZ theory, the relationship between the volume change in the STZ and the shear band velocity is derived as Ω=A(27−lnv/l). The value of A, which is a material dependent constant, is 5.43 × 10−3 for the current BMG at room temperature.

KW - Acoustic emission

KW - Bulk metallic glasses

KW - Shear band velocity

KW - Shear transformation zone

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SN - 0022-3093

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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

M1 - 122767

ER -

Shear band velocity and activation volume during shear deformation by acoustic emission in a Zr-based bulk metallic glass

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Funding

Keywords

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