Difference in the detection limits of flaws in the depths of multi-layered and continuous aluminum plates using low-frequency eddy current testing |
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| Authors: | Hironobu Yamada Teruki Hasegawa Yudai Ishihara Toshihiko Kiwa Keiji Tsukada |
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| Affiliation: | aGraduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan |
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| 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. |
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| Keywords: | Non-destructive testing Eddy current testing Low-frequency magnetic field Magneto-resistive sensor |
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