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Posted inNon Destructive Testing
History of Eddy Current Testing
Eddy current testing has its origins with Michael Faraday's discovery of electromagnetic induction in 1831.…
Posted inNon Destructive Testing
Eddy Current Testing (ET) Overview
Eddy current testing a modern Non-destructive testing – NDT method that has become one of…
Posted inNon Destructive Testing
AE Applications
Acoustic emission is a very versatile, non-invasive way to gather information about a material or…
Posted inNon Destructive Testing
AE Barkhausen Techniques
Barkhausen Effect The Barkhausen effect refers to the sudden change in size of ferromagnetic domains that occur during…
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AE Source Location Techniques
Multi-Channel Source Location Techniques: Locating the source of significant acoustic emissions is often the main…
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Data Display
Software-based AE systems are able to generate graphical displays for analysis of the signals recorded…
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AE Signal Features
With the equipment configured and setup complete, AE testing may begin. The sensor is coupled…
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Equipment
Acoustic emission testing can be performed in the field with portable instruments or in…
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Theory – Acoustic Waves
Wave Propagation A primitive wave released at the AE source is illustrated in the figure…
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Theory – AE Sources
As mentioned in the Introduction, acoustic emissions can result from the initiation and growth of…