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

Gromov, V. E.; Ivanov, Yu. F.; Qin, R. S.; Peregudov, O. A.; Aksenova, K. V. and Semina, O. A. (2017). Degradation of structure and properties of rail surface layer at long-term operation. Materials Science and Technology, 33(12) pp. 1473–1478.

DOI: https://doi.org/10.1080/02670836.2017.1287983

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 10-50 nm in size after passed 500 MTGW. The early stage dynamical recrystallization 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.

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About

• Item ORO ID
• 48590
• Item Type
• Journal Item
• ISSN
• 1743-2847
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Not Set	15-12-00010	Russian Science Foundation

• Keywords
• rail steel; microstructure; defect substructure; internal stress
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2017 Institute of Materials, Minerals and Mining
• Depositing User
• Rongshan Qin