Strain rate response of a Ti-based metallic glass composite at cryogenic temperature

J. Bai; H. C. Kou; J. Wang; J. S. Li; R. Hu

doi:10.1016/j.matlet.2013.12.025

Strain rate response of a Ti-based metallic glass composite at cryogenic temperature

J. Bai, H. C. Kou, J. Wang, J. S. Li, R. Hu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

22 Scopus citations

Abstract

Quasi-static and dynamic deformation behavior of a Ti₄₈Zr ₂₀Nb₁₂Cu₅Be₁₅ bulk-metallic-glass composite (BMGC) were investigated at cryogenic temperature (77 K). Results demonstrate that the composite shows good plasticity at quasi-static deformation, but brittle fracture occurs during dynamic deformation. Compared with quasi-static deformation which is insensitive to strain rate, dynamic deformation of the composites exhibits negative strain-rate response that the fracture strength decreases with increasing strain rate. The matrix is believed to dominate the strain-rate response of the present BMGC at cryogenic deformation. Thermal softening due to significant temperature rising in shear band is believed to be responsible for negative strain-rate response during dynamic deformation at cryogenic temperature.

Original language	English
Pages (from-to)	228-230
Number of pages	3
Journal	Materials Letters
Volume	117
DOIs	https://doi.org/10.1016/j.matlet.2013.12.025
State	Published - 15 Feb 2014

Keywords

Amorphous materials
Composite materials
Cryogenic temperature
Deformation and fracture
Titanium alloy

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10.1016/j.matlet.2013.12.025

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title = "Strain rate response of a Ti-based metallic glass composite at cryogenic temperature",

abstract = "Quasi-static and dynamic deformation behavior of a Ti48Zr 20Nb12Cu5Be15 bulk-metallic-glass composite (BMGC) were investigated at cryogenic temperature (77 K). Results demonstrate that the composite shows good plasticity at quasi-static deformation, but brittle fracture occurs during dynamic deformation. Compared with quasi-static deformation which is insensitive to strain rate, dynamic deformation of the composites exhibits negative strain-rate response that the fracture strength decreases with increasing strain rate. The matrix is believed to dominate the strain-rate response of the present BMGC at cryogenic deformation. Thermal softening due to significant temperature rising in shear band is believed to be responsible for negative strain-rate response during dynamic deformation at cryogenic temperature.",

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T1 - Strain rate response of a Ti-based metallic glass composite at cryogenic temperature

AU - Bai, J.

AU - Kou, H. C.

AU - Wang, J.

AU - Li, J. S.

AU - Hu, R.

PY - 2014/2/15

Y1 - 2014/2/15

N2 - Quasi-static and dynamic deformation behavior of a Ti48Zr 20Nb12Cu5Be15 bulk-metallic-glass composite (BMGC) were investigated at cryogenic temperature (77 K). Results demonstrate that the composite shows good plasticity at quasi-static deformation, but brittle fracture occurs during dynamic deformation. Compared with quasi-static deformation which is insensitive to strain rate, dynamic deformation of the composites exhibits negative strain-rate response that the fracture strength decreases with increasing strain rate. The matrix is believed to dominate the strain-rate response of the present BMGC at cryogenic deformation. Thermal softening due to significant temperature rising in shear band is believed to be responsible for negative strain-rate response during dynamic deformation at cryogenic temperature.

AB - Quasi-static and dynamic deformation behavior of a Ti48Zr 20Nb12Cu5Be15 bulk-metallic-glass composite (BMGC) were investigated at cryogenic temperature (77 K). Results demonstrate that the composite shows good plasticity at quasi-static deformation, but brittle fracture occurs during dynamic deformation. Compared with quasi-static deformation which is insensitive to strain rate, dynamic deformation of the composites exhibits negative strain-rate response that the fracture strength decreases with increasing strain rate. The matrix is believed to dominate the strain-rate response of the present BMGC at cryogenic deformation. Thermal softening due to significant temperature rising in shear band is believed to be responsible for negative strain-rate response during dynamic deformation at cryogenic temperature.

KW - Amorphous materials

KW - Composite materials

KW - Cryogenic temperature

KW - Deformation and fracture

KW - Titanium alloy

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DO - 10.1016/j.matlet.2013.12.025

M3 - 文章

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VL - 117

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JO - Materials Letters

JF - Materials Letters

ER -

Strain rate response of a Ti-based metallic glass composite at cryogenic temperature

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Keywords

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