Grinding induced martensite on the surface of rails

C.J. Rasmussen; Xiaodan Zhang; Hilmar Kjartansson Danielsen; Søren Fæster

Grinding induced martensite on the surface of rails

C.J. Rasmussen
, Xiaodan Zhang
, Hilmar Kjartansson Danielsen
, Søren Fæster

Banedanmark

Research output: Contribution to journal › Conference article › Research › peer-review

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Abstract

Rolling contact fatigue (RCF) is causing crack initiation and crack propagation in rails. Some types of RCF cracks are found to be associated with a white etching layer (WEL). A metallurgical investigation was carried out on a worn rail and the amounts of WEL at different positions on the rail were determined. Two different rail types R260 and R350HT that both had been ground by a grinding train were investigated. The rail sections, studied using optical and scanning electron microscopy, showed that the surface of both types of rails is covered with WELs. The hardness of the WEL is increased compared to the base material and the microstructural investigations reveal that a martensitic structure is present at the surface.

Original language	English
Journal	Proceedings of the Risø International Symposium on Materials Science
Volume	35
Pages (from-to)	439-446
ISSN	0907-0079
Publication status	Published - 2014
Event	35th Risø International Symposium on Materials Science: New Frontiers of Nanometals - DTU, Risø Campus, Roskilde, Denmark Duration: 1 Sept 2014 → 5 Sept 2014 Conference number: 35

Conference

Conference	35th Risø International Symposium on Materials Science
Number	35
Location	DTU, Risø Campus
Country/Territory	Denmark
City	Roskilde
Period	01/09/2014 → 05/09/2014

Keywords

Shot peening
Compressive residual stress
Plastic deformation
Finite element method

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2031 Rasmussen SFNI Symposium 2014 ver8

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@inproceedings{aa19fcd8b9f0425c90447222b3b5b45f,

title = "Grinding induced martensite on the surface of rails",

abstract = "Rolling contact fatigue (RCF) is causing crack initiation and crack propagation in rails. Some types of RCF cracks are found to be associated with a white etching layer (WEL). A metallurgical investigation was carried out on a worn rail and the amounts of WEL at different positions on the rail were determined. Two different rail types R260 and R350HT that both had been ground by a grinding train were investigated. The rail sections, studied using optical and scanning electron microscopy, showed that the surface of both types of rails is covered with WELs. The hardness of the WEL is increased compared to the base material and the microstructural investigations reveal that a martensitic structure is present at the surface. ",

keywords = "Shot peening, Compressive residual stress, Plastic deformation, Finite element method",

author = "C.J. Rasmussen and Xiaodan Zhang and Danielsen, \{Hilmar Kjartansson\} and S{\o}ren F{\ae}ster",

year = "2014",

language = "English",

volume = "35",

pages = "439--446",

journal = "Proceedings of the Ris{\o} International Symposium on Materials Science",

issn = "0907-0079",

publisher = "Ris{\o} National Laboratory",

note = "35th Ris{\o} International Symposium on Materials Science : New Frontiers of Nanometals ; Conference date: 01-09-2014 Through 05-09-2014",

}

TY - GEN

T1 - Grinding induced martensite on the surface of rails

AU - Rasmussen, C.J.

AU - Zhang, Xiaodan

AU - Danielsen, Hilmar Kjartansson

AU - Fæster, Søren

N1 - Conference code: 35

PY - 2014

Y1 - 2014

N2 - Rolling contact fatigue (RCF) is causing crack initiation and crack propagation in rails. Some types of RCF cracks are found to be associated with a white etching layer (WEL). A metallurgical investigation was carried out on a worn rail and the amounts of WEL at different positions on the rail were determined. Two different rail types R260 and R350HT that both had been ground by a grinding train were investigated. The rail sections, studied using optical and scanning electron microscopy, showed that the surface of both types of rails is covered with WELs. The hardness of the WEL is increased compared to the base material and the microstructural investigations reveal that a martensitic structure is present at the surface.

AB - Rolling contact fatigue (RCF) is causing crack initiation and crack propagation in rails. Some types of RCF cracks are found to be associated with a white etching layer (WEL). A metallurgical investigation was carried out on a worn rail and the amounts of WEL at different positions on the rail were determined. Two different rail types R260 and R350HT that both had been ground by a grinding train were investigated. The rail sections, studied using optical and scanning electron microscopy, showed that the surface of both types of rails is covered with WELs. The hardness of the WEL is increased compared to the base material and the microstructural investigations reveal that a martensitic structure is present at the surface.

KW - Shot peening

KW - Compressive residual stress

KW - Plastic deformation

KW - Finite element method

M3 - Conference article

SN - 0907-0079

VL - 35

SP - 439

EP - 446

JO - Proceedings of the Risø International Symposium on Materials Science

JF - Proceedings of the Risø International Symposium on Materials Science

T2 - 35th Risø International Symposium on Materials Science

Y2 - 1 September 2014 through 5 September 2014

ER -

Grinding induced martensite on the surface of rails

Abstract

Conference

Keywords

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