Shear Band Creation in Amorphous Ribbon under Bending

Abstract

Metallic glasses subjected to bending loads often exhibit the significant strength through the creation of multiple shear bands. Amorphous metallic glasses in the form of thin ribbon (about 40 μm in thickness) can be bent to large curvatures without the failure. The thickness of metallic glass is also an important factor that influences the exceptional properties of these materials. The shear bend formation under bending of Fe40Ni40B20 (at. %) amorphous ribbon was studied. There is highly localized plastic deformation in shear bands as a function of the curvature radius. The development of primary and secondary shear bands is related to the inhomogeneous plastic deformation that occurs at the room temperature. The total deformation increases with the decreasing the bending radius. Shear bands in the bent ribbons were observed using scanning electron microscopy.