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Locating and Sizing Rail Head Defects for Rail Head Repair Welds Using Phased Array Ultrasonics

Document Series
Research Results
Federal Railroad Administration
Report Number
RR 20-16
Subject Track
Phased array ultrasound, PAUT, transverse defect, TD, rail head repair, weld repair

The study revealed that it is possible to locate defects in the rail head within the desired precision if a recognizable feature such as a bolt hole, rail end, or weld are nearby; that is, the method presented provides an accurate distance from a known datum to within approximately ±0.5 inch.

Last updated: Friday, September 4, 2020