Abstract
We examined the difference in the detection limits of flaws in the depths of multi-layered and continuous aluminum plates using low-frequency eddy current testing. The detection limits were measured by using a magneto-resistive sensor. Comparing the frequency of an applied magnetic field, the detection limit at 50 Hz is deeper than that at 1 kHz. Comparing the sample structure, the detection limit in the multi-layered samples is deeper than that in the continuous samples. These results are likely due to the differences in the skin depth and conductivity of the sample.
Original language | English |
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Pages (from-to) | 108-111 |
Number of pages | 4 |
Journal | NDT and E International |
Volume | 41 |
Issue number | 2 |
DOIs | |
Publication status | Published - Mar 2008 |
Keywords
- Eddy current testing
- Low-frequency magnetic field
- Magneto-resistive sensor
- Non-destructive testing
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering