Size Effect Suppresses Brittle Failure in Hollow Cu60Zr40 Metallic Glass Nanolattices Deformed at Cryogenic Temperatures
journal contributionposted on 09.09.2015, 00:00 authored by Seok-Woo Lee, Mehdi Jafary-Zadeh, David Z. Chen, Yong-Wei Zhang, Julia R. Greer
To harness “smaller is more ductile” behavior emergent at nanoscale and to proliferate it onto materials with macroscale dimensions, we produced hollow-tube Cu60Zr40 metallic glass nanolattices with the layer thicknesses of 120, 60, and 20 nm. They exhibit unique transitions in deformation mode with tube-wall thickness and temperature. Molecular dynamics simulations and analytical models were used to interpret these unique transitions in terms of size effects on the plasticity of metallic glasses and elastic instability.
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exhibitlayer thicknessesglass nanolatticesharnesssize effects20 nmmacroscale dimensionsplasticityHollow Cu 60Zr Metallic Glass Nanolattices DeformednanoscaleductileMolecular dynamics simulationsSize Effect Suppresses Brittle Failurematerialdeformation modeCryogenictermtransitioninstabilitymodelTemperaturesTo