Article | REF: BM6450 V1

Non-destructive testing

Author: Mohammed CHERFAOUI

Publication date: July 10, 2006

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4. Magnetic particle inspection

Non-destructive testing by magnetic particle inspection aims to detect surface or underlying defects (figure 3 ).

4.1 Excitation phase analysis

The part is subjected to the action of the magnetic field. There are three important magnetic field parameters to consider:

  • its nature. The waveform used conditions the penetration of the induction lines into the cross-section of the part. The closer we are to the wave corresponding to the DC field, the deeper we penetrate into the cross-section, and the better we can detect underlying defects. Depending on the system used, various waveforms can be encountered:...

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