Comparison of macroscopic mechanical properties and shear band characteristics established by acoustic emission measurements in Fe85-xCoxB15 amorphous alloys ribbons

A complex statistical and spectral analysis of acoustic emission during ten sile deformation of the Fe85-xCoxB15 (x=19, 21, 30, 40, 50) metallic glasse s is performed aiming at clarification of the effect of topological order o n inhomogeneous plastic flow and shear resistance. A correlation is establi shed between the critical shear stress for the catastrophic shear bands and quantitative characteristics of acoustic emission pulses, corresponding to local shear bands.. This correlation is understandable within the framewor k of existing in the literature polycluster model of amorphous solids, whic h considers some suitable intercluster boundaries as main regions for nucle ation and spreading of plastic shears.