From brittle to ductile: Density optimization for Zr-BMG cellular structures

 Two-dimensional cellular structures made from Zr35Ti30Cu7.5Be27.5 bulk metallic glass with varying relative densities realized in hexagonal structures ranging from 2.5% to 86.0% were fabricated and characterized under quasi-static compression loading. Three distinctive deformation regions were revealed: collective buckling, local failure and global failure, which originate from size effects in metallic glasses and demonstrate the ideal density of ∼25.0% for energy absorption for this structure.