Published on 17-May-2024

Advanced Ultrasonic Testing Methods

Advanced Ultrasonic Testing Methods

Table of Content

Ultrasonic Testing comprises a range of NDT techniques that send ultrasonic waves through an object or material. These high-frequency sound waves are transmitted into materials to characterise the material or for flaw detection. Most UT inspection applications use short pulse waves with frequencies ranging from 0.1-15 MHz, although frequencies up to 50 MHz can be used. One common application for this test method is ultrasonic thickness measurement, which is used to ascertain the thickness of an object such as when assessing pipework corrosion.

Advanced Ultrasonic Testing Methods 

Ultrasonic Testing comprises a few methods that are used to determine any flaws or irregularities in any material. Check them out.

1) Phased Array Ultrasonic Testing (PAUT):

phased array ultrasonic testing (PAUT)

A Phased Array Ultrasonic scanning unit involves many crystals arranged in a manner that sends sound waves in different directions inside the material. The sound from different crystals are timed by the computer at different phases – hence the name Phased Array (Timed elements & Arrangement of elements)

The Major Advantages of the technology are:

  • Inspection is quick since the manual to and fro movement by the user is not required. More possibility of finding defects without using different angle probes, since a single probe scans in a different direction.
  • PAUT gives multiple views of the defects through advanced presentation views such as B-Scan (depth of defect) view, C-Scan View(Top view), S-Scan view (sectorial view) and conventional A-scan view (echo pattern).

PAUT gives multiple views of the defects

Complete scanning can be recorded and interpretation can be made later by many people. So the technology is believed to be a reliable process for inspection.

Explore Our Phased Array Ultrasonic Testing Guide

2. Time of Flight Diffraction (TOFD):