This method will provide indications of surface and subsurface discontinuities, the depth and exact size can be determined by the use of the proper technique. Ultrasonic pulses are directed into the test object which produces echoes and reflections which then indicate the presence, absence and location of flaws, interface and/or discontinuities.
Ultrasonic examination for thickness determination may be made using either the resonance or pulse-echo technique. This technique determines thickness or reveals corrosion discontinuities near the surface or deep within components or structures. It offers the advantage of examining components without removal or disassembly.
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