Role of pre-existing shear band morphology in controlling the fracture behavior of a Zr–Ti–Cu–Ni–Al bulk metallic glass

Shear bands were introduced into a Zr–Ti–Cu–Ni–Al bulk metallic glass (BMG) by one-directional cold rolling and the effect on fracture toughness anisotropy was examined. Two different rolling and shear band orientations relative to the crack plane were used, with the rolling force oriented along either the width (CR-W) or thickness (CR-T) direction of single edge notched bend specimens. The results showed the CR-W samples demonstrated a 50%...