D. Knauss et Gad. Briggs, THE EFFECT OF ANISOTROPY IN TIME-RESOLVED ACOUSTIC MICROSCOPY, Journal of physics. D, Applied physics, 29(4), 1996, pp. 1093-1099
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.