Acoustic Emission

First works by acoustic emission method appeared in 70s.Sources of an acoustic emission are divided into internal and external.For example, acoustic emission caused by friction, blow, turbulent fluid and gas streams.Analysis of all parameters allows to make judgement, regarding damage dynamics of material.It is used effectively for undamaging control while testing and using articles.It is physical nature causes expanding fields of application for the method in technology.First ones are sources located on object’s surface.For example, acts of plastic deformation, micro- and macro destruction and phase transformation.Moscow State Technical University named after Bauman.