Defect substructure change in 100-m differentially hardened rails in long-term operation

V. E. Gromov, A. A. Yuriev, Yu F. Ivanov, A. M. Glezer, S. V. Konovalov, A. P. Semin, R. V. Sundeev

Research Center for Physical Materials Science and Composite Materials

Research output: Contribution to journal › Article › peer-review

Abstract

By methods of optical and transmission electron diffraction microscopy the evolution in structural phase states of surface layers head of differentially hardened rails of DT 350 category to the depth up to 10 mm along the central axis after the passed tonnage of 691.8 mln. t brutto was studied. The formation of gradient substructure being expressed in regular change in scalar and excess density of dislocations, curvature-torsion amplitude of steel crystal lattice, degree of deformation transformation of lamellar pearlite structure was defected. The failure mechanisms of cementite plates were considered.

Original language	English
Pages (from-to)	224-227
Number of pages	4
Journal	Materials Letters
Volume	209
DOIs	https://doi.org/10.1016/j.matlet.2017.07.135
Publication status	Published - 15 Dec 2017

Keywords

Differentially hardened rails
Dislocation density
Long-term operation
Substructure

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2017.07.135

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title = "Defect substructure change in 100-m differentially hardened rails in long-term operation",

abstract = "By methods of optical and transmission electron diffraction microscopy the evolution in structural phase states of surface layers head of differentially hardened rails of DT 350 category to the depth up to 10 mm along the central axis after the passed tonnage of 691.8 mln. t brutto was studied. The formation of gradient substructure being expressed in regular change in scalar and excess density of dislocations, curvature-torsion amplitude of steel crystal lattice, degree of deformation transformation of lamellar pearlite structure was defected. The failure mechanisms of cementite plates were considered.",

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author = "Gromov, {V. E.} and Yuriev, {A. A.} and Ivanov, {Yu F.} and Glezer, {A. M.} and Konovalov, {S. V.} and Semin, {A. P.} and Sundeev, {R. V.}",

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journal = "Materials Letters",

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T1 - Defect substructure change in 100-m differentially hardened rails in long-term operation

AU - Gromov, V. E.

AU - Yuriev, A. A.

AU - Ivanov, Yu F.

AU - Glezer, A. M.

AU - Konovalov, S. V.

AU - Semin, A. P.

AU - Sundeev, R. V.

PY - 2017/12/15

Y1 - 2017/12/15

N2 - By methods of optical and transmission electron diffraction microscopy the evolution in structural phase states of surface layers head of differentially hardened rails of DT 350 category to the depth up to 10 mm along the central axis after the passed tonnage of 691.8 mln. t brutto was studied. The formation of gradient substructure being expressed in regular change in scalar and excess density of dislocations, curvature-torsion amplitude of steel crystal lattice, degree of deformation transformation of lamellar pearlite structure was defected. The failure mechanisms of cementite plates were considered.

AB - By methods of optical and transmission electron diffraction microscopy the evolution in structural phase states of surface layers head of differentially hardened rails of DT 350 category to the depth up to 10 mm along the central axis after the passed tonnage of 691.8 mln. t brutto was studied. The formation of gradient substructure being expressed in regular change in scalar and excess density of dislocations, curvature-torsion amplitude of steel crystal lattice, degree of deformation transformation of lamellar pearlite structure was defected. The failure mechanisms of cementite plates were considered.

KW - Differentially hardened rails

KW - Dislocation density

KW - Long-term operation

KW - Substructure

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