Basics
History of Eddy Current Testing
Eddy current testing has its origins with Michael Faraday’s discovery of electromagnetic induction in 1831. Faraday was a…
August 24, 2021 · Prabhu TLBasics
Basics
Eddy Current Testing (ET) Overview
Eddy current testing a modern Non-destructive testing – NDT method that has become one of the prime tool…
August 24, 2021 · Prabhu TLBasics
AE Applications
Acoustic emission is a very versatile, non-invasive way to gather information about a material or structure. Acoustic Emission…
August 24, 2021 · Prabhu TLBasics
AE BarkhausenTechniques
Barkhausen Effect The Barkhausen effect refers to the sudden change in size of ferromagnetic domains that occur during magnetization or demagnetization.…
August 24, 2021 · Prabhu TLBasics
AE Source Location Techniques
Multi-Channel Source Location Techniques: Locating the source of significant acoustic emissions is often the main goal of an…
August 24, 2021 · Prabhu TLBasics
Data Display
Software-based AE systems are able to generate graphical displays for analysis of the signals recorded during AE inspection.…
August 24, 2021 · Prabhu TLBasics
AE Signal Features
With the equipment configured and setup complete, AE testing may begin. The sensor is coupled to the test…
August 24, 2021 · Prabhu TLBasics
Equipment
Acoustic emission testing can be performed in the field with portable instruments or in a stationary laboratory…
August 24, 2021 · Prabhu TLBasics
Theory – Acoustic Waves
Wave Propagation A primitive wave released at the AE source is illustrated in the figure right. The displacement…
August 24, 2021 · Prabhu TLBasics
Theory – AE Sources
As mentioned in the Introduction, acoustic emissions can result from the initiation and growth of cracks, slip and…
August 24, 2021 · Prabhu TL