Inverse magnetostrictive effect and electromagnetic non-destructive testing methods

Abstract The influences of mechanical stresses on magnetic properties are investigated. A qualitative and quantitative description of the reversible and irreversible components of the magnetostrictive effect in iron and carbon steels is presented. Applications of the effect in a new method for analysis of stress waves in mechanically stressed ferromagnetic metals, and also in an alternative strategy for enhancement of the signal-to-noise ratio of eddy current testing of tubes, wires and rods in mechanized lines are described, as is a non-destructive method for evaluation of the martensite content in the structure of wire rod.