Eddy Current Inspection

Eddy current testing is an NDT testing method that is based on the principles of electromagnetic induction. Discontinuities are detected with custom made ET probes. EDM notched calibration standards per alloy/temper are used for known defect standards.

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Eddy current testing involves the application of electromagnetic energy to evaluate the condition of a test object. The energy interacts with the material and the interaction process is analyzed to ascertain the condition of the material.

Eddy current instruments allow the technician to evaluate valuable information regarding the properties and condition of the test object. Differences in the underlying processes associated with each frequency make it possible for electromagnetic techniques to test a wide range of materials

Eddy Current Advantages

One of the major advantages of eddy current as an NDT tool is the variety of inspections and measurements that can be performed. In the proper circumstances, eddy current can be used for:

  • Crack detection

  • Material thickness measurements

  • Coating thickness measurements

  • Conductivity measurements for:

  • Material identification

  • Heat damage detection

  • Case depth determination

  • Heat treatment monitoring

    Some of the advantages of eddy current inspection include:

  • Sensitive to small cracks and other defects

  • Detects surface and near surface defects

  • Inspection gives immediate results

  • Equipment is very portable

  • Method can be used for much more than flaw detection

  • Minimum part preparation is required

  • Test probe does not need to contact the part

  • Inspects complex shapes and sizes of conductive materials