Degradation of structure and properties of rail surface layer at long-term operation

V. E. Gromov, Yury Fedorovich Ivanov, R. S. Qin, O. A. Peregudov, K. V. Aksenova, O. A. Semina

Research Center for Physical Materials Science and Composite Materials

Research output: Contribution to journal › Article

Abstract

The microstructure evolution and properties variation of the surface layer of rail steel after passed 500 and 1000 million tons of gross weight (MTGW) have been investigated. The wear rate increases to 3 and 3.4 times after passed 500 and 1000 MTGW, respectively. The corresponding friction coefficient decreases by 1.4 and 1.1 times. The cementite plates were destroyed and formed the cementite particles of around 10–50nm in size after passed 500 MTGW. The early stage dynamical recrystallisation was observed after passed 1000 MTGW. The mechanisms for these have been suggested. The large number of bend extinction contours is revealed in the surface layer. The internal stress field is evaluated.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Materials Science and Technology (United Kingdom)
Volume	33
Issue number	12
DOIs	https://doi.org/10.1080/02670836.2017.1287983
Publication status	Accepted/In press - 11 Feb 2017

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Keywords

defect substructure
internal stress
microstructure
Rail steel

ASJC Scopus subject areas

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

Cite this

Gromov, V. E., Ivanov, Y. F., Qin, R. S., Peregudov, O. A., Aksenova, K. V., & Semina, O. A. (Accepted/In press). Degradation of structure and properties of rail surface layer at long-term operation. Materials Science and Technology (United Kingdom), 33(12), 1-6. https://doi.org/10.1080/02670836.2017.1287983

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AU - Aksenova, K. V.

AU - Semina, O. A.

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10.1080/02670836.2017.1287983