ABSTRACT
This chapter deals with the identification of internal layers, where the influence of the load is often caused by the defect of the lattice, which should not cease even after the discontinuation of the presence of external force effect on the material. It focuses on the actual problem of the detection of residual stress after machining. The chapter draws on the experimental identification of residual stress after machining using a non-destructive method based on Eddy Current. Research indicates that eddy current conductivity measurements can be exploited for nondestructive evaluation of subsurface residual stresses in surface-treated nickel-base super alloy components. The induced voltage is dependent on the frequency of excitation current, which directly affects the depth of the test and also the penetration depth of eddy current. Measuring methods based on eddy current are ranked as non-destructive methods of material testing.
