Conventional ultrasonic investigation of defects in the bulk of complex materials is a common industrial technique. A usual procedure is to scan the specimen in a water bath, where the ultrasonic transducer transmits waves into the investigated material. When the propagating waves reach acoustical discontinuities such as defects, partial reflection occurs. The reflected waves are detected by the transducer, and a graphical representation of the integrity of the specimen is displayed. Some advanced systems even correct for simple attenuation.
展开▼
