Ultrasonic Testing of welds || Ultrasonic NDT Testing procedure || Phased Array Ultrasonic Testing

Ultrasonic Testing (UT)

Ultrasonic Testing of welds uses high-frequency sound waves (typically in the range between 0.5 and 15 MHz) to conduct examinations and make measurements. Besides its wide use in engineering applications (such as flaw detection/evaluation, dimensional measurements, material characterization, etc.), ultrasonics are also used in the medical field (such as sonography, therapeutic ultrasound, etc.).

In general, UT test (ultrasonic testing) is based on the capture and quantification of either the reflected waves (pulse-echo) or the transmitted waves (through-transmission). Each of the two types is used in certain applications, but generally, pulse-echo systems are more useful since they require one-sided access to the object being inspected.


So, we can conclude, Ultrasonic testing (UT) is a family of nondestructive testing, NDT techniques based on the propagation of ultrasonic waves in the object or material tested. Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood, and composites, albeit with less resolution. It is used in many industries including steel and aluminum construction, metallurgy, manufacturing, aerospace, automotive and other transportation sectors.

For more information on UT test (Ultrasonic Testing) please visit:
https://en.wikipedia.org/wiki/Ultraso...

Phased array ultrasonic testing (PAUT) is an advanced method of ultrasonic testing that has applications in medical imaging and industrial nondestructive testing. Common applications are to noninvasively examine the heart or to find flaws in manufactured materials such as welds. Single-element (non-phased array) probes, known technically as monolithic probes, emit a beam in a fixed direction. To test or interrogate a large volume of material, a conventional probe must be physically scanned (moved or turned) to sweep the beam through the area of interest. In contrast, the beam from a phased array probe can be focused and swept electronically without moving the probe. The beam is controllable because a phased array probe is made up of multiple small elements, each of which can be pulsed individually at a computer-calculated timing. The term phased refers to the timing, and the term array refers to the multiple elements. Phased array ultrasonic testing is based on principles of wave physics, which also have applications in fields such as optics and electromagnetic antennae. (source: Wikipedia)

For more information on PAUT please visit:
https://en.wikipedia.org/wiki/Phased_...


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