High manganese casting steel rails are currently used at crossing points of railway tracks, due to its high damage tolerance. Since the rail includes large crystal grains and casting defects, general ultrasonic testing (UT) can not be applied to the rail. Thus, new UT method which can be used for the rail is desired. In this study, new ultrasonic imaging method utilizing both the aperture synthesis and signal processing is proposed. Applicability of the proposed method was evaluated by using the high-manganese steel rails with an artificial surface crack. By utilizing proposed method, the ultrasonic image was improved and distributions of large defects can be roughly observed. However, even utilizing our method, small cracks will be hardly detected and planar-crack may be misjudged as point-shaped defects.
Optimization of ultrasonic testing system applicable to high manganese steel rails
Optimierung eines Ultraschallprüfsystems zur Anwendung auf Schienen-Manganhartstahl
2008
8 Seiten, 13 Bilder, 2 Tabellen, 5 Quellen
Conference paper
Storage medium
English
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