Non-destructive evaluation for hardened carbon steel by using frequency sweeping excitation and spectrogram method

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

Article type: Research Article

Authors: Kai, Yuichiro^{a; *} | Tsuchida, Yuji^a | Enokizono, Masato^a

Affiliations: [a] Faculty of Engineering, Oita University, 700 Dannoharu, Oita 870-1192, Japan

Correspondence: [*] Corresponding author. Yuichiro Kai, Tel.: +81 97 554 7843; Fax: +81 97 554 7843; E-mail: ykai@cc.oita-u.ac.jp

Abstract: This paper presents a frequency sweeping excitation and spectrogram(FSES) method to evaluate hardness and hardening depth of carbon steels by using electromagnetic methods. Magnetic properties of carbon steel samples under different hardening temperature condition are examined by using the FSES method. The results show that the magnetic properties of the hardened carbon steels differ depending on the hardening temperature. It can be said that the FSES method is useful to evaluate the hardening depth and the hardness.

Keywords: Hardening, carbon steel, eddy current coefficient, hysteresis coefficient, frequency sweeping excitation and spectrogram method

DOI: 10.3233/JAE-2010-1252

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1287-1294, 2010