Material characterization of cast irons with an EMAT/EC dual probe

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

Article type: Research Article

Authors: Ohtaki, Keitaro^a | Uchimoto, Tetsuya^{b; *} | Takagi, Toshiyuki^a

Affiliations: [a] Graduate School of Engineering, Tohoku University, Aoba6-6-1, Aramaki, Aoba-ku, Sendai, Japan | [b] Institute of Fluid Science, Tohoku University, Katahira2-1-1, Aoba-ku, Sendai, Japan

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

Abstract: Mechanical properties of cast irons strongly depend on the graphite morphology and the matrix structure, thus both of them should be evaluated for their characterization. The former can be evaluated by ultrasonic testing (UT), and the latter can be evaluated by eddy current testing (ECT). Considering the background above, this study proposes a novel method for the material characterization of cast irons with an EMAT/EC dual probe. For this purpose, we conducted UT and ECT for cast irons with different graphite morphology and matrix structures with the present probe. As a result, correlations between the nodularity of graphite and ultrasonic velocity, and between one the pearlite ratio and EC signals were obtained. These results imply that the EMAT/EC dual probe is effective for the material characterization of cast irons.

Keywords: Dual probe, electromagnetic acoustic transducer, eddy current testing, cast irons, matrix structure, graphite form

DOI: 10.3233/JAE-2010-1230

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1135-1141, 2010