Nature of the structural degradation of rail surfaces during operation

Yury Fedorovich Ivanov, V. E. Gromov, A. M. Glezer, O. A. Peregudov, K. V. Morozov

Research output: Contribution to journalArticle

Abstract

Patterns in the transformation of the structural and phase states and the defect substructure of rail surface layers up to 10 mm thick during long-term operation (gross transit tonnages of 500 and 1000 mln t) are found via optical, scanning, and transmission electron microscopy. According to the nature of the fracture and the degree of defectiveness, three layers can be distinguished: a surface layer, a transition layer, and the base metal. It is shown that the operation of steel rails is accompanied by full fractures in surface layers up to 15 μm thick with lamellar pearlite grains and the formation of ferrite–carbide mixtures with nanosized particles. The deformation of steel increases the densities of scalar and excess dislocations, the curvature–torsion values of the crystal lattice, and the amplitudes of internal stress fields. Structural elements that can act as stress concentrators are identified.

Original languageEnglish
Pages (from-to)1483-1488
Number of pages6
JournalBulletin of the Russian Academy of Sciences: Physics
Volume80
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

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rails
surface layers
degradation
steels
pearlite
transition layers
concentrators
transit
substructures
crystal lattices
stress distribution
residual stress
scalars
transmission electron microscopy
scanning electron microscopy
defects
metals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nature of the structural degradation of rail surfaces during operation. / Ivanov, Yury Fedorovich; Gromov, V. E.; Glezer, A. M.; Peregudov, O. A.; Morozov, K. V.

In: Bulletin of the Russian Academy of Sciences: Physics, Vol. 80, No. 12, 01.12.2016, p. 1483-1488.

Research output: Contribution to journalArticle

Ivanov, Yury Fedorovich ; Gromov, V. E. ; Glezer, A. M. ; Peregudov, O. A. ; Morozov, K. V. / Nature of the structural degradation of rail surfaces during operation. In: Bulletin of the Russian Academy of Sciences: Physics. 2016 ; Vol. 80, No. 12. pp. 1483-1488.
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