eddy current inspection


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eddy current inspection

eddy current inspection
Eddy current which is induced in a disc moving through a nonuniform magnetic field.
A nondestructive testing technique (NDT) that interrogates a component for surface inconsistencies and conditions such as hardness, conductivity, etc. It can only be applied to conductive materials. Eddy current testing generates small alternating magnetic fields on the surface of the component, and these magnetic fields interact with conductive components to generate small eddy currents on the surface. These currents in turn generate their own secondary alternating magnetic fields that interact with the primary fields. By analyzing the interaction, the defects and the changes in the conductivity and the permeability of the surface can be analyzed. The detection limits of the technique depend upon the surface condition of the piece under examination. It is normally not possible to detect defects that are smaller than about three times the surface roughness of the component. The detectable length of defects depends upon the integrity of the scan pattern.
References in periodicals archive ?
Having this type of approval allows Conco to perform eddy current inspections on safety-related heat exchangers at any nuclear facility that is a member of NUPIC and accepts the audit report," says James A.
Thermography and eddy current inspections continue on the 22 right-hand wing reinforced carbon-carbon panels.
Thermography and eddy current inspections are complete on the left-hand reinforced carbon-carbon panels, with eddy current work continuing on the right-hand wing.
The AD requires measuring the diameter of the hole counterbore of the outboard idler hinge fitting of the left and right wing flap; the performance of repetitive high frequency eddy current inspections to detect cracks at the flap idler hinge fitting if necessary and replacement of the flap idler hinge fitting with a new like part if any crack is detected.
successfully completed critical path eddy current inspections for four
Under the amendment, which is effective from 9 May 2000, repetitive high frequency eddy current inspections are required, together with corrective actions where necessary.
This AD requires conducting repetitive, high-frequency eddy current inspections to detect cracks on the locking pin fittings of the baggage door and locking pin housings of the fuselage, as well as repetitive detailed visual inspections to detect cracks of the inner door structure on all four door locking attachment fittings and corrective actions if necessary.
This AD requires detailed visual and eddy current inspections of the lower wing skin at the three outboard fasteners of the stringer 64 end fitting to detect cracks, and corrective actions if necessary.