Abstract
Abstract The effect of the shear bands generated by cold rolling on the tensile ductility and fracture behavior of the Zr 52.5 Ti 5 Cu 18 Ni 14.5 Al 10 bulk metallic glass (BMG) is analyzed. The results reveal significant changes in the fracture behavior of the cold-rolled material with respect to the as-cast BMG. Fracture in the cold-rolled glass occurs along the pre-existing shear bands forming an angle of 45° with the loading direction. In addition, the fracture morphology shows a regular vein pattern oriented along the shear direction, which indicates that a considerable shear stress is active on the fracture plane. This is in contrast to the fracture behavior of the as-cast glass, where the normal stress plays a significant role. Here, the fracture angle is 55° and the fracture surface is characterized by the conventional irregular pattern of radiating ridges. Finally, work-hardening was observed in the cold-rolled BMG even in the absence of visible shear band intersection. Possible alternative mechanisms for determining this behavior are discussed.
Published Version
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