Effect of Zener-Hollomon parameter on the flow behavior of Zr-based metallic glass

Z. F. Yao; J. C. Qiao; J. M. Pelletier; Y. Yao

doi:10.1016/j.jallcom.2019.152987

Effect of Zener-Hollomon parameter on the flow behavior of Zr-based metallic glass

Z. F. Yao, J. C. Qiao, J. M. Pelletier, Y. Yao

School of Mechanics,Civil Engineering and Architecture

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

7 Scopus citations

Abstract

The constitutive behavior of Zr-based metallic glass ribbon around the glass transition temperature was investigated. The Zener-Hollomon equation was adopted to predict the flow stresses. The experimental results show that an exponent value of 0.75 and activation energy magnitude of 343 kJ/mol can be used in the hyperbolic sine model to predict the flow stress response of the steady-state stage. The activation energy is consistent with the free volume theory (335 kJ/mol). It is observed that the flow stress during steady-state is independent of the previously strain rate history and is only sensitivity to the current strain rate. A Z-parameter constitutive model to describe the hot deformation behavior of Zr-based metallic glass is developed.

Original language	English
Article number	152987
Journal	Journal of Alloys and Compounds
Volume	819
DOIs	https://doi.org/10.1016/j.jallcom.2019.152987
State	Published - 5 Apr 2020

Keywords

Constitutive equation
Deformation
Flow stress
Free volume
Metallic glass

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10.1016/j.jallcom.2019.152987

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title = "Effect of Zener-Hollomon parameter on the flow behavior of Zr-based metallic glass",

abstract = "The constitutive behavior of Zr-based metallic glass ribbon around the glass transition temperature was investigated. The Zener-Hollomon equation was adopted to predict the flow stresses. The experimental results show that an exponent value of 0.75 and activation energy magnitude of 343 kJ/mol can be used in the hyperbolic sine model to predict the flow stress response of the steady-state stage. The activation energy is consistent with the free volume theory (335 kJ/mol). It is observed that the flow stress during steady-state is independent of the previously strain rate history and is only sensitivity to the current strain rate. A Z-parameter constitutive model to describe the hot deformation behavior of Zr-based metallic glass is developed.",

keywords = "Constitutive equation, Deformation, Flow stress, Free volume, Metallic glass",

author = "Yao, {Z. F.} and Qiao, {J. C.} and Pelletier, {J. M.} and Y. Yao",

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T1 - Effect of Zener-Hollomon parameter on the flow behavior of Zr-based metallic glass

AU - Yao, Z. F.

AU - Qiao, J. C.

AU - Pelletier, J. M.

AU - Yao, Y.

PY - 2020/4/5

Y1 - 2020/4/5

N2 - The constitutive behavior of Zr-based metallic glass ribbon around the glass transition temperature was investigated. The Zener-Hollomon equation was adopted to predict the flow stresses. The experimental results show that an exponent value of 0.75 and activation energy magnitude of 343 kJ/mol can be used in the hyperbolic sine model to predict the flow stress response of the steady-state stage. The activation energy is consistent with the free volume theory (335 kJ/mol). It is observed that the flow stress during steady-state is independent of the previously strain rate history and is only sensitivity to the current strain rate. A Z-parameter constitutive model to describe the hot deformation behavior of Zr-based metallic glass is developed.

AB - The constitutive behavior of Zr-based metallic glass ribbon around the glass transition temperature was investigated. The Zener-Hollomon equation was adopted to predict the flow stresses. The experimental results show that an exponent value of 0.75 and activation energy magnitude of 343 kJ/mol can be used in the hyperbolic sine model to predict the flow stress response of the steady-state stage. The activation energy is consistent with the free volume theory (335 kJ/mol). It is observed that the flow stress during steady-state is independent of the previously strain rate history and is only sensitivity to the current strain rate. A Z-parameter constitutive model to describe the hot deformation behavior of Zr-based metallic glass is developed.

KW - Constitutive equation

KW - Deformation

KW - Flow stress

KW - Free volume

KW - Metallic glass

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DO - 10.1016/j.jallcom.2019.152987

M3 - 文章

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

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Effect of Zener-Hollomon parameter on the flow behavior of Zr-based metallic glass

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Keywords

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