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Modelling rail steel microstructure and its effect on crack initiation

Lookup NU author(s): Dr Francis Franklin, Dr David Fletcher, Professor Ajay Kapoor

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Abstract

The quality of rail steel has improved greatly in recent years and the material is more resistant to wear, plastic deformation and crack initiation; but track forces have also increased, and cracking of rails is a major concern. Different steel microstructures have different wear and rolling contact fatigue (RCF) behaviours when subject to cyclic, rolling-sliding, compressive contact. In order to capture the differences, it is necessary to model these at a microstructural level. This paper describes the development of microstructural models for incorporation into a wear and crack initiation model. A new mechanism is introduced which distinguishes RCF lives of pearlitic microstructures with different percentage volumes of pro-eutectoid ferrite. © 2008 F.J. Franklin.

Publication metadata

Author(s): Franklin FJ, Garnham JE, Fletcher DI, Davis CL, Kapoor A

Publication type: Article

Publication status: Published

Journal: Wear

Year: 2008

Volume: 265

Issue: 9-10

Pages: 1332-1341

ISSN (print): 0043-1648

ISSN (electronic): 1873-2577

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.wear.2008.03.027

DOI: 10.1016/j.wear.2008.03.027

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