Natural Crack Sizing Based on Eddy Current Image and Electromagnetic Field Analyses

Journal Article · Mon Mar 06 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2184598· OSTI ID:20798264

Endo, H; Uchimoto, T; Takagi, T ^[1]; Nishimizu, A; Koike, M; Matsui, T ^[2]

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1. Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai (Japan)
2. Power and Industrial Systems, R and D Laboratory, Hitachi, Ltd., Hitachi, Ibaraki (Japan)

An eddy current testing (ECT) system with multi-coil type probes is applied to size up cracks fabricated on austenite stainless plates. We have developed muti-channel ECT system to produce data as digital images. The probes consist of transmit-receive type sensors as elements to classify crack directions, working as two scan direction modes simultaneously. Template matching applied to the ECT images determines regions of interest in sizing up cracks. Finite element based inversion sizes up the crack depth from the measured ECT signal. The present paper demonstrates this approach for fatigue crack and stress corrosion cracking.

• OSTI ID: 20798264
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 820; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
AUSTENITIC STEELS
CRACKS
EDDY CURRENT TESTING
FATIGUE
FINITE ELEMENT METHOD
IMAGE PROCESSING
STRESS CORROSION