Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4833018
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Funding
- A*STAR, Singapore [092 156 0122]
- A*STAR Computational Resource Centre
- National Natural Science Foundation of China [11242011, 11372236, 11021202]
- Institute of High Performance Computing (IHPC)
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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 Cu50Zr50 NG with d = to 15 nm. Our results reveal a drastic change in deformation mode from a single shear band (d similar to 15 to 10 nm), to cooperative shear failure (d similar to 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. (C) 2013 AIP Publishing LLC.
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