Residual stress mapping in railway rails

Joe Kelleher, D. J. Buttle, Paul Mummery, Philip Withers

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    Abstract

    Residual stress has been mapped in the heads of ex-service railway rails. Three normal grade rails and one mill-heat-treated (MHT) rail were examined. Transverse, vertical and in-plane shear stresses were deduced using energy dispersive synchrotron X-ray, magnetic permeability and laboratory X-ray measurements. Differences were found between samples both in the distribution of compressive stress introduced at the running surface, and in the locations of the balancing tensile stress below this. The mill heat treated rail was found to have tensile stress closer to the gauge corner than the other rails. While the effect of residual stress in rails must be considered alongside the transient stresses present during wheel passage, tensile residual stresses close to the running surface are believed to be detrimental to rail integrity.
    Original languageEnglish
    Title of host publicationMaterials Science Forum|Mater Sci Forum
    Pages165-170
    Number of pages5
    Volume490-491
    DOIs
    Publication statusPublished - 15 Jul 2005
    Event7th International Conference on Residual Stresses, ICRS-7 - Xi'an
    Duration: 1 Jul 2005 → …
    http://<Go to ISI>://000230305200061

    Publication series

    NameMaterials Science Forum

    Other

    Other7th International Conference on Residual Stresses, ICRS-7
    CityXi'an
    Period1/07/05 → …
    Internet address

    Keywords

    • Magnetic permeability
    • Mill heat treated rail
    • Railway rails
    • Rolling contact fatigue
    • Synchrotron
    • X-ray diffraction

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