Correlation of acoutstic-emission signal amplitude with deformation rate for the structure of materials

Abstract

1. A change in deformation rate has almost no effect on the form of AE amplitude distribution and it is mainly reduced to a change in average AE amplitude value. 2. The dependence of average AE amplitude value recorded on deformation rate is of a more complex form than a directly proportional relationship which is quantitatively explained within the limits of the model of superposition of individual radiation pulses with transition of an accumulation of linear defects across a barrier (boundary), and it approximates to a linear relationship with low deformation rates. 3. During practical diagnosis of the prefailure state from AE signals over a wide range of loading rates (frequencies), it is necessary to take account of the effect of deformation rate on the AE amplitude parameters.