In the last decades a large number of researchers investigated the different failure mechanisms of railroad rails, including wear and surface or subsurface initiated RCF (rolling contact fatigue); due to the continuous increase of in service conditions severity, failure occurrence is increasing not only for rails but also for wheels. The behaviour of R7T wheel steel under rolling contact fatigue conditions has been investigated in the present paper, by means of a twin disc Amsler machine; tests were performed under dry or water lubrication conditions, different contact loads and slide/roll ratio gamma. Both cylindrical and convex rollers have been used to assess the influence of the stress distribution under the contact area. Test results made evident the negative effect of small slide/roll ratio values and the crucial role played by water lubrication in accelerating crack nucleation and propagation. Scanning electron microscope analysis of longitudinal cross sections of the rollers allowed to investigate the typical RCF failure mechanisms and the morphology of propagating cracks. (VDEh)


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Rolling contact fatigue in R7T rail wheel steel


    Weitere Titelangaben:

    Dauerwälzermüdung des Stahls R7T für Eisenbahnräder


    Beteiligte:
    Roberti, R. (Autor:in) / Faccoli, M. (Autor:in) / Gelfi, M. (Autor:in) / Ghidini, A. (Autor:in)


    Erscheinungsdatum :

    2001


    Format / Umfang :

    8 Seiten, 7 Bilder, 2 Tabellen, 9 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




    Rolling contact fatigue of wheel and rail

    Dörner, Florian / Kleiner, Ott / Schindler, Christian et al. | Tema Archiv | 2012


    Wheel/rail rolling contact fatigue – Probe, predict, prevent

    Ekberg, Anders / Akesson, Bengt / Kabo, Elena | Tema Archiv | 2014


    Rolling contact fatigue of a rail steel

    Clayton, P. / Hill, D.N. | Tema Archiv | 1987


    Wheel-rail rolling contact theory

    Kalker, J.J. | Tema Archiv | 1991