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首页> 美国政府科技报告 >Railroad Wheel Residual Stress Detection Program. An Evaluation of Residual211 Stress in Cast Steel Railroad Wheels Using Electromagnetic Acoustic Transducers 211 (EMATs)
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Railroad Wheel Residual Stress Detection Program. An Evaluation of Residual211 Stress in Cast Steel Railroad Wheels Using Electromagnetic Acoustic Transducers 211 (EMATs)

机译：铁路车轮残余应力检测程序。利用电磁声换能器211（EmaTs）评估铸钢铁路车轮残余应力

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摘要

A nondestructive testing (NDT) method to determine the residual stress in the211u001erims of cast steel railroad wheels has been evaluated by the Association of 211u001eAmerican Railroads (AAR), at the Federal Railroad Administration's Transportation 211u001eTechnology Center (TTC), Pueblo, Colorado. The National Institute of Standards 211u001eand Technology (NIST), Boulder Colorado, has developed an ultrasonic system which 211u001euses an electromagnetic acoustic transducer (EMAT) technique to determine the 211u001eresidual stress in cast steel railroad wheels. The system is designed to induce 211u001epolarized shear waves into the rim of the wheel and measures the thickness 211u001eaveraged stress from the return sound signal. A similar ultrasonic system, known 211u001eas the DEBRO-30, is commercially available in Europe and uses a conventional 211u001epiezoelectric transducer (PET) to measure the thickness averaged stress in rail 211u001eand forged railroad wheels. These two ultrasonic systems were used during this 211u001eproject and the ultrasonic data obtained by the systems have been evaluated in 211u001ethis report.

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