Ultrasonic Image Systems for Nondestructive Testing

Abstract

Ultrasonic imaging techniques are finding increased application in the medical and industrial fields because the image presentation often offers the advantage of improved interpretation capability for the ultrasonic test. In the nondestructive testing field, ultrasonic imaging inspection methods have recently been expanded to include television techniques; the operation and application of these techniques are emphasized in this report. In addition to interpretation advantages, television methods can also present improved resolution capabilities and faster inspection speeds, as compared to other ultrasonic inspection methods. Continuous-wave ultrasonic television systems have shown promise as inspection methods for relatively thin, flat material in which inspection is desired to determine such things as bonding, particle size variations, or homogeneity. Flat, reactor fuel plates and thin metal spot welds are examples of materials for which this type of inspection has been shown to be useful. Pulsed inspection systems have also been demonstrated, with relatively slow image presentation rates. These systems, when further developed, offer promise for greater range of application. [This work was performed under the auspices of the U. S. Atomic Energy Commission.]