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Research on measurement of residual stresses in flash-butt-weld rails using X-ray Diffraction

机译：X射线衍射闪电焊接轨道残余应力测量研究

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The residual stress, which is unavoidable in the process of flash-butt-weld rails, plays important roles in the service life of the railway rails. However, knowledge of magnitude, direction, and sign of the residual stress is useful for maintenance and failure prevention. In this paper, we measured the residual stresses in the flash-butt weld of the U71Mn railway rail, using X-ray diffraction method. Besides, we investigated the influence of grinding on residual surface stress. This investigation showed that residual stress generated by grinding could be removed by electro-polishing, we also found that there was longitudinal compressive stress in the foot and head region, while the web region presented tensile stress, and in the transverse position, all of the three regions existed both compressive and tensile stress.
机译：在闪光焊接导轨的过程中不可避免的残余应力在铁路轨道的使用寿命中起重要作用。然而，幅度，方向和剩余压力的迹象知识可用于维护和预防失败。在本文中，我们使用X射线衍射法测量了U71MN铁路轨道的闪光焊接中的残余应力。此外，我们研究了研磨对残余表面应力的影响。这次研究表明，通过电抛光可以除去通过研磨产生的残余应力，我们还发现脚部和头部区域中存在纵向压缩应力，而幅材区域呈现拉伸应力，并且在横向位置呈现三个区域都存在压缩和拉伸应力。

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