Published on 19-Apr-2024

Phased Array Ultrasonic Testing: What, How & Where

Phased Array Ultrasonic Testing: What, How & Where

Sources - ALTAIR

Table of Content

PAUT full form is Phased Array Ultrasonic Testing. When it comes to NDT methods, Phased Array Ultrasonic Testing (PAUT) has emerged as a powerful and efficient technique. Phased Array Ultrasonic Testing, as the name suggests, uses multiple transducers in an array inside the testing probe to manipulate the input ultrasonic beam by exciting them in various sequences that can be controlled digitally. These Ultrasonic Transducers are made of piezoelectric materials that convert one form of energy to another to fulfill the probe's purpose.

What is Phased Array Ultrasonic Testing (PAUT) Inspection Technique?


Phased Array Ultrasonic Testing Inspection Technique

Phased Array Ultrasonic Testing is a modern NDT Technique that utilizes multiple ultrasonic elements to inspect materials. Unlike conventional Ultrasonic Testing Methods, which use a single transducer to send and receive waves, the PAUT test employs an array of elements. Phased Array Ultrasonic Testing, as the name suggests, uses multiple transducers in an array inside the testing probe to manipulate the input ultrasonic beam by exciting them in various sequences that can be controlled digitally. These Ultrasonic Transducers are piezoelectric materials that convert one form of energy to another to fulfill the probes’ purpose. The sequenced actuation of the transducers facilitates sectorial, depth, and linear scanning.

It can also be used in situations where conventional ultrasonic testing methods are used. It can be used for checking wall thickness profiles and Weld Inspection, as well as inspections of Heat Affected Zones (HAZ), which makes it versatile and viable across industries like manufacturing, construction, petrochemicals, and aerospace. The input Ultrasonic Testing Procedure of the phased array ultrasonic testing apparatus is made to sweep across the testing subject and hence pick up on deformities that would have been missed by a conventional single-beam PAUT ultrasonic testing device that produces a singular directed beam.

What are the Basic Principles of Phased Array Ultrasonic Testing?