Development of Ultrasonic Techniques to Establish Flaw Size

摘要

Ultrasonic approaches for determining flaw size and orientation in butt welds,hanger plates, hanger pins, and trunnions were investigated. Cracks can be detected to 1/8 inch depth in hanger plates, hanger pins, and trunnions if the orientation of the crack allows reflected sound to return to a receiving transducer. The orientation of a planar flaw and the diameter of the searching transducer can have the effect of producing a greater maximum amplitude for the smaller planar flaw. Determining the size and orientation of flaws in butt welds is not attainable with off-the-shelf ultrasonic equipment available at this time and with current operator expertise.