철도차량 윤축재료의 파괴특성 분석

The wheelset is one of important parts in railway bogie, directly related with the safety of rolling stock. In this investigation, the tensile failure behavior of railway wheelset materials, wheel and axle, were investigated. The tensile coupons were prepared from the actual rolling stock parts, which were operated over 20 years. The tensile testing was performed according to the KS guideline. During tensile testing, an infrared camera was employed to monitor temperature changes in specimen as well as demonstrate temperature contour in terms of thermographic images. The thermographic images of tensile specimens showed comparable results with mechanical behavior of tensile materials. In this paper, the failure mode and mechanism of railway wheelset materials were provided with the aid of infrared thermography technique.