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NDT non-destructive testing

NDT non-destructive testing

Last Updated on March 13, 2023 by You Ling

Application of Piezoelectric Ceramics in NDT non-destructive testing

What is NDT non-destructive testing

NDT (Non-Destructive Testing) refers to a variety of methods used to evaluate the properties of a material, component or system without causing any harm to it. The main objective of NDT is to detect any defects or discontinuities that could potentially lead to failure or decreased performance.

There are several NDT methods including:

Ultrasonic testing (UT)

Radiographic testing (RT)

Magnetic particle testing (MT)

Liquid penetrant testing (PT)

Eddy current testing (ET)

Acoustic emission testing (AE)

Visual testing (VT)

Thermal/Infrared testing (IRT)

NDT is used in a wide range of industries including aerospace, manufacturing, oil and gas, power generation, construction and transportation, to name a few. It is an essential tool for ensuring the safety, reliability and longevity of materials, components, and systems.

We mainly introduce ultrasonic nondestructive testing

How ultrasonic nondestructive testing works

Ultrasonic nondestructive testing (NDT) works by using high-frequency sound waves to penetrate a material and detect any internal flaws or defects. An ultrasonic transducer sends sound waves into the material, which bounce off any boundaries or inhomogeneities and return to the transducer. By analyzing the time it takes for the sound waves to travel through the material and reflect back, as well as the amplitude and frequency of the returning signals, the inspector can determine the size, shape, and location of any defects. Ultrasonic NDT is commonly used in industries such as aerospace, automotive, and manufacturing to test the integrity of parts and materials without damaging them.

Which piezo elements can be used for ultrasonic nondestructive testing?

Ultrasonic NDT applications typically consist of single-layer piezoelectric sensors. Ultrasonic transducers for NDT applications can be thin disks or plates of our PZT-40 material, operating at very high frequencies to generate very short pulses for good depth resolution.