Publication at Faculty of Mathematics and Physics |
2009
Abstract
Scaling behavior is found in acoustic emission events associated with stress drops observed in velocity driven plastic deformation of an Al alloy, which exhibits jerky plastic flow. The occurrence of scaling proves that these acoustic emission events, which are commonly regarded as 'elementary' ones, have a small-scale self-organized structure comprising a group of peaks correlated in time.
This structure reveals details of the temporal variation in elementary plastic events at a microsecond scale, which are hardly accessible by other measurement techniques.