Ut thickness gauging
Ultrasonic thickness measurements is a technique using high-frequency sound energy to conduct examinations and obtain thickness measurements. A straight beam is introduced into the test object perpendicular to the surface and round-trip time is measured. Quantifiable information can be gathered for detection of localised or general wall-thickness changes.
UT shear wave
The ultrasonic shear wave method is a technique which encompasses the use of predetermined angles for the identification of subsurface anomalies not found directly underneath the transducer itself. Indications within a material and or weldement reflect ultrasonic energy back to the transducer, displaying as an A-scan, in which an operator may assess for relevant information concerning component integrity.
The use of ultrasonic shear waves has all the advantages of weld inspection with no inherent safety concerns, no disruption of production due to radiation hazards, near real-time inspection results, and vertical defect sizing for engineering critical assessments. Information can be obtained on surface and subsurface indications detrimental to the end use of components. A high degree of accuracy can be achieved in estimates of discontinuity size, shape and orientation. The technique requires access to only one side of the component, with minimal specimen surface preparation.
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