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The increasing use of high-speed trains, resulting in higher stress to the material and serious accidents with human injuries in the past, lead to a demand for shorter inspection intervals, extended scope of inspection and more stringent test requirements to be applied to the critical components. One component, which is inspected in regular intervals, is the axle of the railway wheel set. The manual ultrasonic inspection of used axles by experienced personal is time consuming (since several sound beam angles have to be used to cover the complete test area), expensive, and of course, subjective. Rail axles Inspection is carried out in depot, and methods used are magnetic particle inspection, ultrasonic and eddy current methods. However, manual intervention is required for all these methods. One alternative method of crack detection for railway axle inspection has been proposed. AC Thermography method is for the exposed body of the axles and aims to improve the speed of the inspection and improve crack detection reliability. Using the rail axle by passing an alternating current and observing the heat patterns produced on a thermal camera is a potential method of carrying out this project. The project describes modelling and experimental work showing how the method could be deployed in the workshop.

Advanced and Improved Non-Destructive Method for Rail Axle Inspection