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Angle Beam Ultrasonic Testing Models and Their Application to Identification and Sizing of Surface Breaking Vertical Cracks  

Song, Sung-Jin (School of Mechanical Engineering, Sungkyunkwan University)
Kim, Hak-Joon (Center for Nondestructive Evaluation, Iowa State University)
Jung, Hee-Jun (School of Mechanical Engineering, Sungkyunkwan University)
Kim, Young-H. (School of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.22, no.6, 2002 , pp. 627-636 More about this Journal
Abstract
Identification and sizing of surface breaking vertical cracks using angle beam ultrasonic testing in practical situation quite often become very difficult tasks due to the presence of non-relevant signals caused by geometric reflectors. The present work introduces effective and systematic approaches to take care of such a difficulty by use oi angle beam ultrasonic testing models that can predict the expected signals from various targets very accurately. Specifically, the model-based TIFD (Technique for Identification of Flaw signals using Deconvolution) is Proposed for the identification of the crack tip signals from the non-relevant geometric reflection signals. In addition, the model-based Size-Amplitude Curve is introduced for the reliable sizing of surface breaking vertical cracks.
Keywords
ultrasonic testing; identification of flaw signals; sizing; vertical cracks; ultrasonic testing models;
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