Delayed shear banding and evolution of local plastic flow in a metallic glass

B. A. Sun; Z. Y. Liu; Y. Yang; C. T. Liu

doi:10.1063/1.4894860

Delayed shear banding and evolution of local plastic flow in a metallic glass

B. A. Sun, Z. Y. Liu, Y. Yang, C. T. Liu^*

^*Corresponding author for this work

Centre for Advanced Structural Materials

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

18 Citations (Scopus)

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Abstract

Metallic glasses (MGs) or other amorphous materials often yield macroscopically with the instantaneous formation of shear bands under the applied stresses. Here, through microcompression tests, we showed that, below the conventional yield stress, shear banding can still be activated but requires an incubation time. The incubation or delay time is found to be closely related to the level of the applied stress. From a dynamic evolution model entailing the plastic deformation units in MGs, the delayed shear banding behavior is modeled as a result of the spatial evolution of the local internal plastic flow.

Original language	English
Article number	91904
Journal	Applied Physics Letters
Volume	105
Issue number	9
Online published	5 Sept 2014
DOIs	https://doi.org/10.1063/1.4894860
Publication status	Published - Sept 2014

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COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in B. A. Sun, Z. Y. Liu, Y. Yang, and C. T. Liu, "Delayed shear banding and evolution of local plastic flow in a metallic glass", Appl. Phys. Lett. 105, 091904 (2014) and may be found at https://doi.org/10.1063/1.4894860.

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AU - Yang, Y.

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AB - Metallic glasses (MGs) or other amorphous materials often yield macroscopically with the instantaneous formation of shear bands under the applied stresses. Here, through microcompression tests, we showed that, below the conventional yield stress, shear banding can still be activated but requires an incubation time. The incubation or delay time is found to be closely related to the level of the applied stress. From a dynamic evolution model entailing the plastic deformation units in MGs, the delayed shear banding behavior is modeled as a result of the spatial evolution of the local internal plastic flow.

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JO - Applied Physics Letters

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Delayed shear banding and evolution of local plastic flow in a metallic glass

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GRF: Dynamics and Stability of Shear Banding in Metallic and Oxide Glasses

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Delayed shear banding and evolution of local plastic flow in a metallic glass

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GRF: Dynamics and Stability of Shear Banding in Metallic and Oxide Glasses

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