Seok-Woo received Teaching Excellence Award for MSE 3004 “Mechanical Behavior of Materials” [Teaching Excellence Letter].
Seok-Woo’s article entitled “Size Effect Suppresses Brittle Failure in Hollow Cu60Zr40 Metallic Glass Nanolattices Deformed at Cryogenic Temperatures” was published at Nano Letters [Link].
To harness “ smaller is more ductile” behavior emergent at nanoscale and to proliferate it onto materials with macroscale dimensions, we produced hollow-tube Cu60 Zr40 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 eff ects on the plasticity of metallic glasses and elastic instability.