The comparison between UT & PAUT

Here is the thing, comparing ultrasonic testing with phased array ultrasonic testing comes with many similarities and differences. However, it is the differences that make them unique from one another.

A few of these similarities include:

• Both are non-destructive testing methods.
• They both utilize ultrasonic sound and signals in identifying flaws
• Both use the same calibration methods
• They can identify tiny or hidden flaws that are often difficult for other testing methods like the visual inspection to identify.

However, there are still differences between these two test methods, including

• The difference in the number of piezoelectric elements in the transducers where PAUT has more elements
• Phased Array Ultrasonic Testing supports beam steering, which increases the ability to control the beams for higher accuracy. This feature does not apply to conventional ultrasonic testing.
• For PAUT, the angle and signal patterns can be programmed, unlike the UT, which can only be operated manually.
• The transmitter and receiver are often housed in the same container as conventional ultrasonic testing. But for the phased array ultrasonic testing.
• PAUT has a higher inspection speed and accuracy than UT.

Conclusion

To wrap up, ultrasonic testing and phased array ultrasonic testing have similarities in their primary working principle. However, the similarities end as factors like incident angles, focal points, and the number of transducer elements are very different for both testing methods.

In any case, the phased array ultrasonic testing method has become the preferred testing procedure for many professionals as it offers many advantages over UT. Still, an understanding of the working principles, their features, and calibration methods for both testing methods can help you identify the suitable testing method for your peculiar quality assessment situation.