Non Destructive Testing 1 min read
History of Eddy Current Testing
Eddy current testing has its origins with Michael Faraday’s discovery of electromagnetic induction in 1831. Faraday was a chemist in…
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Non Destructive Testing 3 min read
Eddy Current Testing (ET) Overview
Eddy current testing a modern Non-destructive testing – NDT method that has become one of the prime tool for quality…
Non Destructive Testing 5 min read
AE Applications
Acoustic emission is a very versatile, non-invasive way to gather information about a material or structure. Acoustic Emission testing (AET) is…
Non Destructive Testing 1 min read
AE Barkhausen Techniques
Barkhausen Effect The Barkhausen effect refers to the sudden change in size of ferromagnetic domains that occur during magnetization or demagnetization. During magnetization, favorably oriented…
Non Destructive Testing 4 min read
AE Source Location Techniques
Multi-Channel Source Location Techniques: Locating the source of significant acoustic emissions is often the main goal of an inspection. Although…
Uncategorized 3 min read
Data Display
Software-based AE systems are able to generate graphical displays for analysis of the signals recorded during AE inspection. These displays…
Non Destructive Testing 2 min read
AE Signal Features
With the equipment configured and setup complete, AE testing may begin. The sensor is coupled to the test surface and…
Non Destructive Testing 3 min read
Equipment
Acoustic emission testing can be performed in the field with portable instruments or in a stationary laboratory setting. Typically,…
Non Destructive Testing 5 min read
Theory – Acoustic Waves
Wave Propagation A primitive wave released at the AE source is illustrated in the figure right. The displacement waveform is…
Non Destructive Testing 5 min read
Theory – AE Sources
As mentioned in the Introduction, acoustic emissions can result from the initiation and growth of cracks, slip and dislocation movements,…