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    Experimental Investigation on Fatigue Crack Propagation in Surface-Hardened Layer of High-Speed Train Axles

    Experimental Investigation on Fatigue Crack Propagation in Surface-Hardened Layer of High-Speed Train Axles by Chun Gao, Zhengwei Yu, Yuanyuan Zhang, Tao Fan, Bo Zhang, Huajian Song, Hang Su

    Published 2025-07-01

    This study examines fatigue crack growth behavior in induction-hardened S38C axle steel with a gradient microstructure. High-frequency three-point bending fatigue tests were conducted to evaluate crack growth rates (d<i>a</i>/d<i>N</i>) across three depth-defined regions: a h...

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