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Effect of different surface profile on wear of rail steel (AS1085.1) used in Australian heavy-haul railways

机译：不同表面轮廓对澳大利亚重型铁路中使用的钢轨（AS1085.1）的磨损的影响

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The extreme diversity of conditions acting on railways necessitates a variety of experimental approaches to study the critical wear mechanisms that present themselves at the contact interface. This work investigates the effects of contact pressure and geometry in rolling-contact wear tests by using discs with different radii of curvature to simulate the varying contact conditions that may be typically found in the field. It is commonly adapted to line contact interface as it has constant contact pressure. But practical scenario of the rail wheel interface, the contact area increase and contact pressure change as tracks worn off. ududThe tests were conducted without any significant amount of traction, but micro slip was still observed due to contact deformation. Moreover, variation of contact pressure was observed due to contact patch elongation and diameter reduction. Rolling contact fatigue, adhesive and sliding wear were observed on the curved contact interface. The development of different wear regimes and material removal phenomena were analysed using microscopic images in order to broaden the understanding of the wear mechanisms occurring in the rail-wheel contact.
机译：作用在铁路上的各种极端条件要求采取各种实验方法来研究在接触界面处出现的关键磨损机理。这项工作通过使用具有不同曲率半径的圆盘来模拟在现场通常会发现的变化的接触条件，从而研究了滚动接触磨损试验中接触压力和几何形状的影响。由于它具有恒定的接触压力，因此通常适用于线路接触界面。但是在实际应用中，如果轮轨磨损，则接触面积会增加，接触压力会发生变化。 ud ud进行的测试没有任何明显的牵引力，但是由于接触变形仍然观察到微打滑。此外，由于接触斑的伸长和直径减小，观察到接触压力的变化。在弯曲的接触界面上观察到滚动接触疲劳，粘附和滑动磨损。使用显微镜图像分析了不同磨损方式和材料去除现象的发展，以拓宽对轮-轮接触中发生的磨损机理的了解。

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