Flow serration and shear-band propagation in bulk metallic glasses

H. M. Chen, J. C. Huang, S. X. Song, T. G. Nieh, J. S.C. Jang

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Flow serration in bulk metallic glasses (BMGs) was analyzed using high-sensitivity strain gauges. Based on the displacement-time profile for one serration, shear-band propagating speed was determined and found to be insensitive to the applied strain rates. The disappearance of serration at high strain rates is a result that the signal of displacement burst was overwhelmed by the applied strain rate. In comparison with the ductile Pd-based and brittle Mg-based BMGs, the ductility of BMGs appears to be closely related to the dynamics during shear-band propagation.

Original languageEnglish
Article number141914
JournalApplied Physics Letters
Issue number14
StatePublished - 2009


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