Optimization of Ultrasonic Testing System Applicable to High Manganese Steel Rails
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.
High Manganese Steel Rail Ultrasonic Scattering Aperture synthesis
Ryuta HIROKAWA Yoshihiro MIZUTANI Yu KUROKAWA Masumi MAYUZUMI Akira TODOROKI
Department of Mechanical Sciences and Engineering, Tokyo Institute of Technology;2-12-1, O-okayama, Department of Mechanical and Control Engineering, Tokyo Institute of Technology;2-12-1, O-okayama, M Materials for Nuclear Energy Materials Science Research Laboratory, Central Research Institute of El
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1426-1433
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）