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Abstracts
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Authors
Clark, AV; Fortunko, CM; Lozev, MG; Schaps & Renken
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Title
Determination of Sheet Steel Formability Using Wide Band Electromagnetic-Acoustic Transducers
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Journal
Res Nondest Evaluation Vol 4 No 3 1992 pp.165-182
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Abstract: An electromagnetic- acoustic transducer (EMAT) system was used in conjunction with a "sampled" CW signal-processing method to generate, receive, and process longitudinal and shear waves in thin steel sheets. Using the system, swept frequency measurements were made up to 7.5 MHz. To relate the measurements to sheet steel formability, a dimensionless frequency ratio, K, was computed from the resonant frequencies. From theoretical considerations, K should be related to a measure of sheet steel formability, F. This parameter is traditionally measured by plastically deforming uniaxial tension specimens. Good correlation was found between K and F for a set of steel sheet representative of those typically used to produce automobile body parts.
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