Evaluation of susceptibility to stress corrosion cracking based on non-linear eddy current method

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II

Article type: Research Article

Authors: Oikawa, Ryota^a | Uchimoto, Tetsuya^{b; *} | Takagi, Toshiyuki^b | Urayama, Ryoichi^b | Nemoto, Yoshiyuki^c | Takaya, Shigeru^c | Keyakida, Satoshi^d

Affiliations: [a] Graduate School of Engineering, Tohoku University, Aoba 6-6-1, Aramaki, Aoba-ku, Sendai, 980-8579, Japan | [b] Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan | [c] Japan Atomic Energy Agency, Japan | [d] Sumitomo Metal Technology Inc., Japan

Correspondence: [*] Corresponding author. Tel./Fax: +81 22 217 5262; E-mail: uchimoto@ifs.tohoku.ac.jp

Abstract: This paper discusses the feasibility of non-linear eddy current method to evaluate material degradations of austenitic stainless steels associated with irradiation assisted stress corrosion cracking (IASCC). For the purpose, tensile tests at elevated temperatures are conducted using model alloys simulating radiation-induced segregation (RIS), and magnetization curves of the tensile test specimens are measured by vibrating sample magnetometer (VSM). Microstructure of magnetization of the tensile test specimens is observed by magnetic force microscopy (MFM). Finally, non-linear eddy current method is carried out for the tensile test specimens. It is shown that the 3rd higher harmonic ratio of the pick-up signal is related to the targeted nominal strain.

Keywords: Nondestructive evaluation, irradiation assisted stress corrosion cracking, non-linear eddy current method

DOI: 10.3233/JAE-2010-1254

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1303-1308, 2010