Basics 3 min read
Present State of Eddy Current Inspection
Present State of Eddy Current Inspection Eddy current inspection is used in a variety of industries to find defects and…
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Basic Principles of Eddy Current Inspection
Eddy current inspection is one of several NDT methods that use the principal of “electromagnetism” as the basis for conducting…
Basics 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…
Basics 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…
Basics 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)…
Basics 1 min read
AE BarkhausenTechniques
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…
Basics 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…
Basics 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…
Basics 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…
Basics 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…
Basics 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,…