THE EFFECT OF ANISOTROPY IN TIME-RESOLVED ACOUSTIC MICROSCOPY

A model for evaluating time-resolved acoustic microscopy measurements of cracks in anisotropic solids is presented. Calculations of the time -of-flight traces of acoustic waves reflected from the face of an incl ined crack (FR) and the diffracted waves from the crack tip were carri ed out. Furthermore, the theoretical results for the FR signals are co mpared with measurements in a Ni superalloy. The most significant effe ct of anisotropy is the possible appearance of a signal due to shear w aves with horizontal polarization.