Affiliations: [a] Department of Energy Conversion Science, Kyoto
University, Kyoto, Japan
Correspondence:
[*]
Corresponding author: Katsuyuki Kinoshita, Department of Energy
Conversion Science, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto
606-8501, Japan. Tel.: +81 75 753 5897; Fax: +81 75 753 5897; E-mail:
kinosita@energy.kyoto-u.ac.jp
Abstract: We report a novel non-destructive evaluation method (NDE) that
relies on the magnetic properties of the inherent ferromagnetic phase in
austenitic stainless steel (SUS) parts to assess the state of damage. The
effects of the volume fraction, internal stress, and shape anisotropy of the
ferromagnetic phase on the electromagnetic impedance signal used in the NDE are
discussed on the basis of experimental results for cold-rolled SUS 304 steel
plates of different thicknesses with and without stress relief annealing. In
particular, the influence of shape anisotropy is clarified on the basis of
measurements conducted on 0.5-mm-thick samples both parallel and perpendicular
to the rolling direction. The results of the measurements show that the
parameters obtained by the proposed method are indicative of damage.
