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HomeKey Engineering MaterialsKey Engineering Materials Vol. 626Capture of Shear Crack Propagation in Metallic...

Capture of Shear Crack Propagation in Metallic Glass by High-Speed Camera and In Situ SEM

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Abstract:

The dynamic double-notched experiments by using Split Hopkinson Pressure Bars (SHPB) and high-speed camera were performed on bulk metallic glass. In the double-notched experiment, shear crack propagating process was captured with the high temporal resolution of high-speed camera and the crack front propagating velocity was estimated to be 1137m/s. the shear strain/shear stress curve of BMG under dynamic loading was also obtained. Static in-situ SEM tensile experiments were included to study the multiple shear bands propagating behavior on a glassy ribbon. It was found that shear bands propagates progressively in an intermittent and discontinuous manner, and the choice of which shear bands to propagate and which ones to keep still among multiple shear bands is quite stochastic. This is explained qualitatively from the view point of energy.

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Advances in Engineering Plasticity XII

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Periodical:

Key Engineering Materials (Volume 626)

Pages:

162-170

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.626.162

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Online since:

August 2014

Authors:

Bing Hou*, Meng Zhao, Pei Yang, Yu Long Li

Keywords:

Bulk Metallic Glasses, High-Speed Camera, In Situ SEM, Shear Band, Shear Crack

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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