Historical Survey of Developments

Abstract

Table 9.1 lists all current methods of ultrasonic testing of materials. They are categorized by reference to three basic criteria: namely the type of primary measured quantity, the form of radiated ultrasound used (continuous wave or pulses) and the effect of an anomaly within the material under test or on its surface. Based on the presentation in the Table, each method will be discussed to an extent depending on its practical importance.