Failure behavior and energy release of Zr-based amorphous alloy under dynamic compression

ZHANG Yunfeng; LUO Xingbai; SHI Dongmei; ZHANG Yuling; LIU Guoqing; ZHEN Jianwei

doi:10.11883/bzycj-2018-0114

Volume 39 Issue 6

Jun. 2019

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ZHANG Yunfeng, LUO Xingbai, SHI Dongmei, ZHANG Yuling, LIU Guoqing, ZHEN Jianwei. Failure behavior and energy release of Zr-based amorphous alloy under dynamic compression[J]. Explosion And Shock Waves, 2019, 39(6): 063101. doi: 10.11883/bzycj-2018-0114

Citation:

ZHANG Yunfeng, LUO Xingbai, SHI Dongmei, ZHANG Yuling, LIU Guoqing, ZHEN Jianwei. Failure behavior and energy release of Zr-based amorphous alloy under dynamic compression[J]. Explosion And Shock Waves, 2019, 39(6): 063101. doi: 10.11883/bzycj-2018-0114

Citation:

ZHANG Yunfeng, LUO Xingbai, SHI Dongmei, ZHANG Yuling, LIU Guoqing, ZHEN Jianwei. Failure behavior and energy release of Zr-based amorphous alloy under dynamic compression[J]. Explosion And Shock Waves, 2019, 39(6): 063101. doi: 10.11883/bzycj-2018-0114

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Failure behavior and energy release of Zr-based amorphous alloy under dynamic compression

doi: 10.11883/bzycj-2018-0114

Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050000, Hebei, China

Received Date: 2018-04-09
Rev Recd Date: 2018-05-30

Available Online: 2019-07-25

Publish Date: 2019-06-01

Abstract

Abstract

To study the mechanism of failure behavior and energy release mechanism of Zr-based amorphous alloys, Instron machine, split hopkinson bar, high-speed photography, DSC and SEM are used to achieve the stress-strain curves at low strain rate, stress-strain curves at high strain rate, failure processes, DSC curves and failure morphologies, respectively. The crystallization enthalpy is obtained from DSC curves. The stress-strain curves are fitted by the Johnson-Holmquist II model, and the finite element method using this model is executed to simulate the failure process of material under dynamic compression. The experimental results suggest that the material fractures brittle under compression. Typical vein-like pattern is observed at the fracture surface of the material. The energy releasing occurs simultaneously with the material failure. The simulation results reveal that the internal energy of local crack is higher than crystallization enthalpy of the material. The energy release of Zr-based amorphous alloys results in the elastic potential energy and crystallization energy released by the material with instantaneous crack. The strength of energy release is in direct proportion to strain rates.
- Zr-based amorphous alloys,
- dynamic compression,
- failure,
- energy release,
- high-speed imaging

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References(23)

References

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