Abstract: The invention provides a device for the ultrasonic inspection of a multilayer metal workpiece consisting of at least one parent metal layer and a clad metal layer, and having an outer surface, at least one boundary surface, and an inner surface, the device comprising a housing accommodating at least three spaced-apart, ultrasonic transducing means capable of receiving electrical input signals, initiating transmission of ultrasonic waves to the workpiece, and receiving reflected ultrasonic waves to be transduced into electrical output signals, the transducing means being constituted by an acoustic prism having a first face for at least indirectly contacting a workpiece, a second face extending in a plane forming an angle .alpha. with the plane of the outer surface of the workpiece, and a piezocrystal attached to the second face, wherein the distance L.sub.

Abstract: The method and the device for detecting flaws in materials and their connections comprise the radiation of ultrasonic rays and the reception of that energy after its reflection from the examined product, wherein the component which creates, radiates and receives the ultrasonic energy is comprised of a number of interconnected sub-plates. The focused energy which penetrates the metal has a special form appropriate to the type and shape of the product. The sub-plates are mechanically connected to a cylindrically-shaped base, and electrically interconnected by adjustable electronic control means which appropriately change the characteristics of the sub-plates when necessary. The bases of each sub-plate system are made of a material transparent to ultrasonic rays, for example plastic, and the contact surfaces of the bases of each of the sub-plate systems are fortified by grooves filled with a wear-resistant material.