Phased Array UT
Phased Array Ultrasonic Inspection (PAUT) is a very specialist and advanced method of ultrasonic testing. PAUT is seen as a safer way to carry out radio-graphic inspection, as it can produce an image of the inspected area, without exposing anybody to radiation.
To inspect a large volume of material, a conventional ultrasonic probe must be physically moved to scan the area of interest. In comparison, the beam from a PAUT probe can be focused and swept electronically, without the need to move the probe. The beam emission is controlled as the probe is made up of multiple small elements, each of which can be pulsed individually at calculated times. The term 'phased' refers to the timing, whilst the term array refers to the multiple elements.
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Example of Lack of Root Fusion