DISPERSION OF RAYLEIGH WAVES IN TITANIUM ALLOY RESULTING FROM INHOMOGENEOUS RESIDUAL STRESS INDUCED BY LOW PLASTICITY BURNISHING

摘要

We explore the possibility of using the dispersion of Rayleigh waves for nondestructive inspection of the layer of inhomogeneous residual stress induced by low plasticity burnishing (LPB) on Ti-6Al-4V samples, which inherit mirror-smooth surfaces from the LPB treatment. Our findings suggest that, while the acoustoelastic effect is very small in Ti-6Al-4V, the magnitude of the stress gradient involved still leads to a measurable Rayleigh-wave dispersion, from which information on the stress present could be inferred.