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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.

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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.

Item Type: Journal Item
Copyright Holders: 2017 Institute of Materials, Minerals and Mining
ISSN: 1743-2847
Project Funding Details:
Funded Project NameProject IDFunding Body
Not Set15-12-00010Russian Science Foundation
Keywords: rail steel; microstructure; defect substructure; internal stress
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 48590
Depositing User: Rongshan Qin
Date Deposited: 17 Feb 2017 10:03
Last Modified: 04 May 2019 20:57
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