Study on the Performance of High‐Speed Rail Damage of Four Different Materials

Abstract

For four types of railway rails, corresponding rolling tests have been executed by using the JD-1 wheel/rail simulation device based on the Hertz simulation method, which can ensure the reciprocal contact condition between simulation rail and wheel under experimental conditions approximate to practical contact conditions. The results indicate that, for the rail material which has a higher hardness, the wear volume was less and the plastic deformation layer was thinner after the rolling test, but the crack propagation was more significant and the fatigue damage was severer, showing that its wear resistance was better. The analysis shows that the fatigue resistance of U71Mn rail was better, and considering fatigue is the main failure type for high-speed rail, so it is more suited to the high-speed railway.

Analysis of residual ripples and wheel-rail contact state after profiling milling for reshaping rail profile

“…Previous studies have mainly focused on the maximum milling thickness, milling precision and rail contour disease elimination ability of profiling milling [17][18][19][20]. The residual ripples formed on the surface of the rail profile after profiling milling and its impact on the wheel-rail contact failed to attract adequate attention so far [21].…”

Comparative Fatigue Performance of Decarburized Surfaces in Railway Rails

“…A comparative study of the cyclic deformation characteristics and fatigue behavior of head-hardened pearlitic steel and Hadfield manganese steel has been presented, shedding light on the associated microstructural changes [34]. Furthermore, the plastic deformation layer was found to be thinner in rail materials with higher hardness after the rolling test, indicating better wear resistance but more significant crack propagation and severer fatigue damage [35]. Several studies have investigated the microstructural evolution and grain refinement mechanisms in Ti-10V-2Fe-3Al alloy, providing insights into the deformation-induced grain refinement and amorphization processes.…”