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The Dynamic Tensile Behavior of Railway Wheel Steel at High Strain Rates

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Abstract

The dynamic tensile tests on D1 railway wheel steel at high strain rates were conducted using a split Hopkinson tensile bar (SHTB) apparatus, compared to quasi-static tests. Three different types of specimens, which were machined from three different positions (i.e., the rim, web and hub) of a railway wheel, were prepared and examined. The rim specimens were checked to have a higher yield stress and ultimate tensile strength than those web and hub specimens under both quasi-static and dynamic loadings, and the railway wheel steel was demonstrated to be strain rate dependent in dynamic tension. The dynamic tensile fracture surfaces of all the wheel steel specimens are cup-cone-shaped morphology on a macroscopic scale and with the quasi-ductile fracture features on the microscopic scale.

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Acknowledgments

The authors greatly appreciate the financial support by the National Natural Science Foundation of China (Grant No. 51475392), the Fundamental Research Funds for the Central Universities (Grant No. 2682015RC09) and the Research Fund of State Key Laboratory of Traction Power (Grant No. 2015TPL_T02). The first author would acknowledge the Taiyuan Heavy Industry Railway Transit Equipment Co. Ltd. for providing tested railway wheels. The authors also recognize the assistance of Prof. W.G. Guo and P.H. Li of Northwestern Polytechnical University in dynamic tests.

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Correspondence to Lin Jing.

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Jing, L., Han, L., Zhao, L. et al. The Dynamic Tensile Behavior of Railway Wheel Steel at High Strain Rates. J. of Materi Eng and Perform 25, 4959–4966 (2016). https://doi.org/10.1007/s11665-016-2359-y

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  • DOI: https://doi.org/10.1007/s11665-016-2359-y

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