Long-term operation of rail steel: Degradation of structure and properties of surface layer; Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques; Vol. 10, iss. 5

Long-term operation of rail steel: Degradation of structure and properties of surface layer; Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques; Vol. 10, iss. 5

Detalles Bibliográficos
Parent link:Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Vol. 10, iss. 5.— 2016.— [P. 1101–1105]
Autor Corporativo: Национальный исследовательский Томский политехнический университет
Otros Autores: Gromov V. E. Viktor Evgenjevich, Ivanov Yu. F. Yuriy Fedorovich, Morozov K. V. Konstantin Viktorovich, Peregudov O. A. Oleg, Semina O. A. Oksana Aleksandrovna
Sumario:Title screen
By methods of optical, scanning and transmission electron diffraction microscopy and microhardness and tribology parameters measurement the changes regularities of structure-phase states, defect substructure of rails surface after the long term operation (passed tonnage of gross weight 500 and 1000 mln. tons) were established. It is shown that the wear rate increases in 3 and 3.4 times after passed tonnage of gross weight 500 and 1000 mln. tons, accordingly, and the friction coefficient decreases in 1.4 and 1.1 times. The cementite plates are destroying absolutely and cementite particles of around form with the sizes 10-50 nm are forming after passed tonnage 500 mln tons. The appearance of dynamical recrystallization initial stages is marked after the passed tonnage 1000 mln tons. The possible mechanisms of established regularities are discussed. It is noted that two competitive processes can take place during rails long term operation: 1. Process of cutting of cementite particles followed by their carrying out into the volume of ferrite grains or plates (in the structure of pearlite). 2. Process of cutting, the subsequent dissolution of cementite particles, transition of carbon atoms to dislocations (into Cottrell atmospheres), transition of carbon atoms by dislocations into volume of ferrite grains or plates followed by repeat formation of nanosize cementite particles.
Режим доступа: по договору с организацией-держателем ресурса
Lenguaje:inglés
Publicado: 2016
Materias:
электронный ресурс
труды учёных ТПУ
rails
operation
рельсы
дефектность
субструктуры
фазовые составы
поверхностный слой
Acceso en línea:http://dx.doi.org/10.1134/S1027451016050281
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=654372

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