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FOMA Bohemia Ltd.
FOMA Bohemia is a traditional producer of industrial radiographic films INDUX and related accessories.

467 views
08:08 May-31-2006
wave
ask

Whoever can explain "Edge effect" in eddy current inspection for me?


 
08:32 Jun-06-2006

Jeff Medford

NDT Inspector
Nucor Steel,
USA,
Joined Apr 2005
6
Re: ask It very basic!!! As you get closer to the edge of a test material you eddy current field is compressed in turn increasing your resisitance. In turn that effects your impedence point. Simple. I have performed numerous inspection while having some sort of edge effect. It is no where written that is a follow practice but it is done. As long as you know the effects playing on your inspection. Your good. Just kidding stick to the proceedures and you can go wrong

----------- Start Original Message -----------
: Whoever can explain "Edge effect" in eddy current inspection for me?
------------ End Original Message ------------




 
05:23 Jun-08-2006

Thomas Murphy

NDT Inspector
USA,
Joined Jul 2000
16
Re: ask Is this really true? I would think that the inductive reactance would increase, increasing the impedance. Maybe someone could tell me why I am wrong. The coil parameters are presumed not to have changed. Any help would be appreciated.
Tom

----------- Start Original Message -----------
: It very basic!!! As you get closer to the edge of a test material you eddy current field is compressed in turn increasing your resisitance. In turn that effects your impedence point. Simple. I have performed numerous inspection while having some sort of edge effect. It is no where written that is a follow practice but it is done. As long as you know the effects playing on your inspection. Your good. Just kidding stick to the proceedures and you can go wrong
: : Whoever can explain "Edge effect" in eddy current inspection for me?
------------ End Original Message ------------




 


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