A nondestructive testing (NDT) method to determine the residual stress in the rims of cast steel railroad wheels has been evaluated by the Association of American Railroads (AAR), at the Federal Railroad Administration's Transportation Technology Center (TTC), Pueblo, Colorado. The National Institute of Standards and Technology (NIST), Boulder Colorado, has developed an ultrasonic system which uses an electromagnetic acoustic transducer (EMAT) technique to determine the residual stress in cast steel railroad wheels. The system is designed to induce polarized shear waves into the rim of the wheel and measures the thickness averaged stress from the return sound signal. A similar ultrasonic system, known as the DEBRO-30, is commercially available in Europe and uses a conventional piezoelectric transducer (PET) to measure the thickness averaged stress in rail and forged railroad wheels. These two ultrasonic systems were used during this project and the ultrasonic data obtained by the systems have been evaluated in this report.


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    Title :

    Railroad Wheel Residual Stress Detection Program. An Evaluation of Residual Stress in Cast Steel Railroad Wheels Using Electromagnetic Acoustic Transducers (EMATs)


    Contributors:
    D. Stone (author) / G. Garcia (author) / S. Burnett (author)

    Publication date :

    1998


    Size :

    100 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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