Question

What frequency range would you use to inspect cracks in a soft iron component that is...

What frequency range would you use to inspect cracks in a soft iron component that is coated in a very low conductivity material when using eddy current testing, support the answer with numerical equation.

What special considerations are needed when eddy current testing on ferromagnetic materials?

Homework Answers

Answer #1

Eddy current (EC) non-destructive testing (NDT) is a powerful and widely used method for the reliability assessment in several critical domains such as nuclear or aeronautic. When this technique is applied on a specimen containing ferromagnetic materials, the EC are strongly influenced by the magnetic properties. The mechanical properties on the other hand depend upon the mechanical stress on the specimen.

Eddy current technique in an operating frequency range between 200 Hz and 100 kHz with a single-value interpretation of the individual EC signals for the detection of short fatigue cracks hidden under a rivet head on the aircraft wing.

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