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

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

Keywords

defect substructure
internal stress
microstructure
Rail steel

ASJC Scopus subject areas

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

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title = "Degradation of structure and properties of rail surface layer at long-term operation",

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.",

keywords = "defect substructure, internal stress, microstructure, Rail steel",

author = "Gromov, {V. E.} and Ivanov, {Yury Fedorovich} and Qin, {R. S.} and Peregudov, {O. A.} and Aksenova, {K. V.} and Semina, {O. A.}",

year = "2017",

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day = "11",

doi = "10.1080/02670836.2017.1287983",

language = "English",

volume = "33",

pages = "1--6",

journal = "Materials Science and Technology",

issn = "0267-0836",

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T1 - Degradation of structure and properties of rail surface layer at long-term operation

AU - Gromov, V. E.

AU - Ivanov, Yury Fedorovich

AU - Qin, R. S.

AU - Peregudov, O. A.

AU - Aksenova, K. V.

AU - Semina, O. A.

PY - 2017/2/11

Y1 - 2017/2/11

N2 - 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.

AB - 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.

KW - defect substructure

KW - internal stress

KW - microstructure

KW - Rail steel

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