Frequency sweeping excitation and spectrogram method to evaluate hardened carbon steel

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

Article type: Research Article

Authors: Matsuda, Taisuke^a | Tsuchida, Yuji^a | Enokizono, Masato^{a; *}

Affiliations: [a] Faculty of Engineering, Oita University, Oita, Japan

Correspondence: [*] Corresponding author: Taisuke Matsuda, Faculty of Engineering, Oita University, 700 Dannoharu, Oita 870-1192, Japan. Tel.: +81 97 554 7824, +81 97 554 7821; Fax: +81 97 554 7824, +81 97 554 7822; E-mail: [email protected]

Abstract: This paper presents a frequency sweeping excitation and spectrogram method (FSES method) by magnetic sensor for non-destructive testing of hardened carbon steel. High frequency induction heating can make changes in the microstructure and residual stress. As a result, the magnetic properties such as magnetic permeability, magnetic coercivity and remanent magnetization in materials are changed. This makes it possible to evaluate the hardening conditions by using the FSES method. We tried to examine the degree of yield strength which varies with hardened conditions. Controlling and evaluating of yield strength are very important for actual industrial products.

Keywords: Non-destructive testing, hardened carbon steel, magnetic property, magnetic sensor, yield strength

DOI: 10.3233/JAE-2012-1477

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 319-327, 2012