Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8702
Title: Study of the intrinsic ductile to brittle transition mechanism of metallic glasses
Authors: Ye, JC
Lu, J
Yang, Y
Liaw, PK
Keywords: Brittle-to-ductile transition
Compression test
Metallic glasses
Shear bands
Issue Date: 2009
Publisher: Pergamon-Elsevier Science Ltd
Source: Acta materialia, 2009, v. 57, no. 20, p. 6037-6046 How to cite?
Journal: Acta Materialia 
Abstract: We provide a quantitative account of the shear-banding behavior in Mg-based bulk metallic glasses. Microcompression experiments showed that shear bands propagated in an intermittent manner at the micron and submicron scales. The shear-banding kinetics involves competition between shear-induced softening and subsequent recovery mechanisms; the former depends strongly on the elastic energy release rate at the onset of shear-banding, whereas the latter is correlated with the shear-band offset and scales with the characteristic dimension of the microsamples. With the increase in the sample size, more elastic energy is released into the shear band, which results in larger fluctuations in the serrated plastic flows and the propensity for unstable shear-band propagation. The outcome of the current study reveals the origin of the intrinsic ductile to brittle transition mechanism in metallic glasses.
URI: http://hdl.handle.net/10397/8702
DOI: 10.1016/j.actamat.2009.08.029
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