Rail Strengthening Nature in the Course of Long-Term Operation

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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Using the methods of transmission electron diffraction microscopy and measurement of microhardness, the regularities of the change in the structural-phase states and defective substructure of the surface layers of rails up to 10 mm by fillet after long-term operation (the passed tonnage of 1000 million tons gross) are established. The possible causes of the observed regularities are discussed. A quantitative analysis of the mechanisms of strengthening of rails at different distance from the rolling surface by fillet after long-term operation is carried out. It is shown that strengthening is multifactorial in nature and is due to substructural strengthening caused by the formation of nanoscale fragments; dispersion strengthening by carbide phase particles; strengthening caused by the formation of Cottrell and Suzuki atmospheres on dislocations; internal stress fields, formed inside; and interphase boundaries.

Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalInorganic Materials: Applied Research
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • defective substructure
  • operation
  • phase composition
  • rails
  • strengthening mechanisms
  • structure
  • surface

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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