Comparison of microstructure changes induced in two pearlitic rail steels subjected to a full-scale wheel/rail contact rig test

Autor: P. Secordel, F. Cristofari, Salima Bouvier, J. Wen, Marion Risbet, Julie Marteau
Přispěvatelé: Université de Technologie de Compiègne (UTC), Roberval (Roberval)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Materials science
Full scale
02 engineering and technology
Surfaces and Interfaces
[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
Indentation hardness
Surfaces
Coatings and Films
[SPI.MAT]Engineering Sciences [physics]/Materials
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
[SPI]Engineering Sciences [physics]
020303 mechanical engineering & transports
0203 mechanical engineering
Mechanics of Materials
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Materials Chemistry
Coupling (piping)
Composite material
0210 nano-technology
ComputingMilieux_MISCELLANEOUS
Electron backscatter diffraction
Zdroj: Wear
Wear, Elsevier, 2020, 456-457, pp.203354. ⟨10.1016/J.WEAR.2020.203354⟩
Wear, Elsevier, 2020, 456-457, pp.203354. ⟨10.1016/j.wear.2020.203354⟩
ISSN: 0043-1648
DOI: 10.1016/J.WEAR.2020.203354⟩
Popis: This study focused on the comparison of the microstructure changes induced in two pearlitic rail steels subjected to full-scale wheel-rail contact rig tests (DB Systemtechnik, Germany): a conventional R260 steel grade and a heat-treated premium R370CrHT rail grade (also known as MHH400). The total loading of the wheel/rail contact rig test was computed to be 2.4 million gross tons but aimed at reproducing large deformations caused by loadings around 100 million gross tons into the materials. The description of the microstructure showed the ability of the rig to reproduce large loadings. Through the coupling of optical and SEM observations, EBSD measurements and hardness tests along the depths of the tested rails, it was shown that the plastic deformation was much more confined in R370CrHT than in R260. This thorough comparison of the microstructure changes will help the building of wear scenarios.
Databáze: OpenAIRE
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