Structural and phase states in high-quality rail

O. A. Peregudov, V. E. Gromov, Yu F. Ivanov, K. V. Morozov, S. V. Konovalov

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The structural and phase states and dislocational substructure in high-quality bulk-quenched rail are assessed quantitatively by transmission electron diffraction microscopy. On the basis of the morphological features, the following structural components of the rail steel are identified: plate pearlite (68%); mixed ferrite–carbide grains (28%); and structure-free ferrite grains (4%). Analysis of the flexural extinction contours shows that the stress concentrators in the steel are the boundaries between cementite plates within the pearlite grains; the boundaries between the pearlite grains and the ferrite grains; and the boundaries between globular particles of secondary phase and the ferrite matrix. The particle–matrix boundaries are the most significant stress concentrators and may be regarded as the primary sites of crack formation.

Original languageEnglish
Pages (from-to)260-263
Number of pages4
JournalSteel in Translation
Volume46
Issue number4
DOIs
Publication statusPublished - 1 Apr 2016

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Keywords

  • dislocational substructure
  • phase composition
  • rail
  • structure

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Peregudov, O. A., Gromov, V. E., Ivanov, Y. F., Morozov, K. V., & Konovalov, S. V. (2016). Structural and phase states in high-quality rail. Steel in Translation, 46(4), 260-263. https://doi.org/10.3103/S0967091216040100