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A TWIN-DISC STUDY OF THE ROLE OF THE SURFACE QUALITY ACHIEVED BY GRINDING ON THE WEAR RESISTANCE AND ROLLING CONTACT FATIGUE BEHAVIOR OF WHEEL/RAIL PAIRS

  • P. A. Cuervo
  • , A. Toro
  • , J. M. Meza
  • , J. F. Santa
  • , R. Lewis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The tribological behavior of twin-disc samples prepared under laboratory-controlled grinding operations was studied. A laboratory grinding device was designed and validated to produce similar results to those found in the field in terms of surface quality and presence of white etching layer (WEL). The test samples were evaluated in a twin-disc machine under dry and lubricated conditions. The results showed that the surface finishing parameters and the microstructure change greatly depending on the surface preparation procedure, and that such changes affect the tribological response of the samples. The wear rates of the tribological tests for the different rail surface qualities showed a reduction of 47.4% for the lubricated tests and 7.3% for the dry tests when the surfaces of the rail specimens were finished by grinding. This only applied when the WEL thickness was less than 4 µm.

Original languageEnglish
Title of host publicationCM 2022 - 12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Conference Proceedings
EditorsPaul Meehan, Wenyi Yan, Peter Mutton, Jerome Pun
PublisherInternational Conference on Contact Mechanics of Wheel / Rail Systems
Pages923-932
Number of pages10
ISBN (Electronic)9780646865881
StatePublished - 2022
Externally publishedYes
Event12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2022 - Melbourne, Australia
Duration: 4 Sep 20227 Sep 2022

Publication series

NameCM 2022 - 12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Conference Proceedings

Conference

Conference12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2022
Country/TerritoryAustralia
CityMelbourne
Period4/09/227/09/22

Keywords

  • Friction Coefficient
  • Grinding
  • Rolling Contact Fatigue
  • Twin-disc tests
  • Wear Mechanisms
  • White Etching Layer

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