Formation of Gradient Structure–Phase States in the Surface Layers of 100-m Differentially Quenched Rails

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

Research output: Contribution to journalArticle

Abstract

Abstract—The evolution of the structural-phase states in the surface layers of the head of differentially quenched DT350 rails to a depth of 10 mm are studied by optical microscopy and transmission electron diffraction microscopy along the central axis after the passage of a tonnage of 691.8 mln t gross in the experimental ring of AO VNIIZhT (proof ground for railway transport). The formation of a gradient structure is revealed. In this structure, the scalar and excess dislocation densities, the lattice curvature–torsion amplitude, and the degree of deformation-induced transformation of lamellar pearlite change gradually. The mechanisms of fracture of cementite lamellae are considered.

Original languageEnglish
Pages (from-to)710-715
Number of pages6
JournalRussian Metallurgy (Metally)
Volume2019
Issue number7
DOIs
Publication statusPublished - 1 Jul 2019

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Pearlite
Light transmission
Electron diffraction
Optical microscopy
Rails
Microscopic examination

Keywords

  • Keywords: differentially quenched rails
  • long-term operation
  • phase composition
  • structure

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Formation of Gradient Structure–Phase States in the Surface Layers of 100-m Differentially Quenched Rails. / Gromov, V. E.; Yur’ev, A. A.; Ivanov, Yu F.; Morozov, K. V.; Konovalov, S. V.; Peregudov, O. A.

In: Russian Metallurgy (Metally), Vol. 2019, No. 7, 01.07.2019, p. 710-715.

Research output: Contribution to journalArticle

Gromov, V. E. ; Yur’ev, A. A. ; Ivanov, Yu F. ; Morozov, K. V. ; Konovalov, S. V. ; Peregudov, O. A. / Formation of Gradient Structure–Phase States in the Surface Layers of 100-m Differentially Quenched Rails. In: Russian Metallurgy (Metally). 2019 ; Vol. 2019, No. 7. pp. 710-715.
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AU - Konovalov, S. V.

AU - Peregudov, O. A.

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