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Title: La-based bulk metallic glass failure analysis under static and dynamic loading
Authors: Liu, J.
Shim, V.P.W. 
Keywords: Bulk metallic glass
Modelling of temperature evolution
Pressure Bar (SHPB)
Shear band
Strain rate effects
Issue Date: 2013
Citation: Liu, J., Shim, V.P.W. (2013). La-based bulk metallic glass failure analysis under static and dynamic loading. International Journal of Impact Engineering 60 : 37-43. ScholarBank@NUS Repository.
Abstract: Samples of La-based bulk metallic glass were tested under both static and dynamic compression, and their failure analysed. The strain rates imposed ranged from 10-4/s to 103/s. Quasi-static compression was performed using an Instron universal testing machine and dynamic compression was applied by means of a Split-Hopkinson Pressure Bar (SHPB). This study focuses on: (1) Shear band characteristics under static and dynamic compression. A high-speed optical camera was used to capture visual images of shear band initiation; fracture surfaces were also examined by SEM; (2) Modelling of shear band temperature evolution within the specimen, with the aid of high-speed infrared camera images, to capture the temperature profile of the shear bands; (3) Effect of strain rate on response of La-based BMG. It is postulated that the negative strain rate dependence observed arises from the non-uniform direction of stress within the material, and stress concentration inside specimens. © 2013 Elsevier Ltd. All rights reserved.
Source Title: International Journal of Impact Engineering
ISSN: 0734743X
DOI: 10.1016/j.ijimpeng.2013.04.004
Appears in Collections:Staff Publications

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