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Title: A transition from localized shear banding to homogeneous superplastic flow in nanoglass
Authors: Adibi, S.
Sha, Z.-D.
Branicio, P.S.
Joshi, S.P. 
Liu, Z.-S.
Zhang, Y.-W.
Issue Date: 18-Nov-2013
Citation: Adibi, S., Sha, Z.-D., Branicio, P.S., Joshi, S.P., Liu, Z.-S., Zhang, Y.-W. (2013-11-18). A transition from localized shear banding to homogeneous superplastic flow in nanoglass. Applied Physics Letters 103 (21) : -. ScholarBank@NUS Repository.
Abstract: A promising remedy to the failure of metallic glasses (MGs) by shear banding is the use of a dense network of glass-glass interfaces, i.e., a nanoglass (NG). Here we investigate the effect of grain size (d) on the failure of NG by performing molecular dynamics simulations of tensile-loading on Cu 50Zr50 NG with d = 5 to 15 nm. Our results reveal a drastic change in deformation mode from a single shear band (d ∼ 15 to 10 nm), to cooperative shear failure (d ∼ 10 to 5 nm), to homogeneous superplastic flow (d ≤ 5 nm). Our results suggest that grain size can be an effective design parameter to tune the mechanical properties of MGs. © 2013 AIP Publishing LLC.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.4833018
Appears in Collections:Staff Publications

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