Non-destructive method for evaluation of deterioration of austenitic stainless steel using initial magnetic phase

Issue title: Selected Papers from the 15th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2011)

Article type: Research Article

Authors: Kinoshita, Katsuyuki^{a; *} | Hasegawa, Yu^a | Matsumoto, Eiji^a

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: [email protected]

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.

Keywords: Austenitic stainless steel, non-destructive evaluation method, work-affected layer

DOI: 10.3233/JAE-2012-1485

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 375-380, 2012