Abstract
Sensitive and precision nondestructive evaluations of iron-based material have been investigated by observing the magnetoresistance effects, magnetic Barkhausen noises, conductivity and magnetic susceptibility. The magneto-resistance was found very small as 0.04% or less for the samples with residual strain of 10% in the stainless steel of SUS304, caused by the martensitic transformation up to 60emu/g. Barkhausen noise analyses for Fe-based material in general with a resolution of 1mm was also performed. All these results developed here were cross-checked with the real residual strain by X-ray diffraction spectroscopy, electron-microscope observation and compared with the leakage flux distribution observed by a flux-gate sensor. We developed the sensing techniques independent of sample shape which are really available in factories.
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Yamada, K., Luo, J., Enokizono, M. (2011). Nondestructive Evaluations of Iron-Based Materials by Using AC and DC Electromagnetic Sensors. In: Mukhopadhyay, S.C., Lay-Ekuakille, A., Fuchs, A. (eds) New Developments and Applications in Sensing Technology. Lecture Notes in Electrical Engineering, vol 83. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-17943-3_15
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DOI: https://doi.org/10.1007/978-3-642-17943-3_15
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