Advanced MFLT for detecting far side defects in a welding part of an austenitic stainless steel plate

Issue title: Special Volume: Proceedings of the eleventh International Symposium on Applied Electromagnetics and Mechanics ISEM-Versailles ISEM 03

Article type: Research Article

Authors: Chen, Zhenmao^{a; *} | Yusa, Noritaka^a | Miya, Kenzo^a | Tanahashi, Akira^b | Sakai, Kazuo^b | Chigusa, Naoki^b

Affiliations: [a] International Institute of Universality, 1-4-6 Nezu, Bunkyo-ku, Tokyo, 113-0031, Japan. Tel.: +81 3 5814 5350; Fax: +81 3 3827 0682; E-mail: chen@iiu.co.jp | [b] Nuclear Power Division, The Kansai Electric Power Co.,Inc., 3-3-22, Nakashima, Kita-ku, Osaka, 530-8270, Japan. Tel.: +81 6 7501 0157; Fax: +81 6 6444 6279; E-mail: k446152@kepco.co.jp

Correspondence: [*] Corresponding author

Abstract: In this paper an advanced MFLT method is proposed for detecting far side defects in a welding part of a thick stainless steel plate based on the measurement of the remanent magnetic field. The method consists of a double yoke magnetizer, high frequency demagnetization procedure and an inverse analysis scheme. The performance of the proposed method is investigated through numerical simulations and experiments. The results show that a far side defect in a plate as thick as 20 mm is possibly to be detected by using the proposed strategy.

Keywords: magnetic flux leakage method, high frequency demagnetization, inverse problem, remanent magnetization

DOI: 10.3233/JAE-2004-620

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 527-532, 2004