Rail strengthening in prolonged operation

V. E. Gromov, Yu F. Ivanov, K. V. Morozov, O. A. Peregudov, A. B. Yur’ev

Research output: Contribution to journalArticle

Abstract

In rail operation (with traffic corresponding to passed tonnage of gross loads of 500 and 1000 million t), the surface layer of the steel is significantly strengthened. Electron-microscope data permit quantitative analysis of the contribution of different mechanisms to rail strengthening in prolonged operation, at different distances from the contact surface. The strengthening is multifactorial: it involves substructural strengthening associated with nanofragment formation; dispersional strengthening by carbide particles; the formation of atmospheres at dislocations; and polar stress due to interphase and intraphase boundaries. The significant increase in the surface strength of rail steel after prolonged operation (passed tonnage of gross loads of 1000 million t) is due to the presence of long-range internal stress fields and to the fragmentation of material with the formation of nanostructure.

Original languageEnglish
Pages (from-to)405-409
Number of pages5
JournalSteel in Translation
Volume46
Issue number6
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • rail operation
  • rail structure
  • rails
  • strengthening

ASJC Scopus subject areas

  • Materials Science(all)

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    Gromov, V. E., Ivanov, Y. F., Morozov, K. V., Peregudov, O. A., & Yur’ev, A. B. (2016). Rail strengthening in prolonged operation. Steel in Translation, 46(6), 405-409. https://doi.org/10.3103/S096709121606005X