Publication detail

Wheel/rail adhesion and damage under different contact conditions and application parameters of friction modifier

WANG, W. LI, S. DING, H. LIN, Q. GALAS, R. OMASTA, M. MELI, E. GOU, J. LIU, Q.

Original Title

Wheel/rail adhesion and damage under different contact conditions and application parameters of friction modifier

Type

journal article in Web of Science

Language

English

Original Abstract

Friction modifier (FM) is a newly developed third medium to control the service performance of wheel/rail. The wheel/rail performance is influenced by the wheel/rail contact conditions and FM application parameters. Therefore, the effects of FM application parameter and the wheel/rail contact parameters on the adhesion and damage behaviors of wheel and rail materials should be explored. In this study, the influences of application amount of FM, the wheel/rail contact stress and the creepage on the adhesion and damage behaviors were studied using a twin-disc machine. Results indicated that the increase in contact stress would reduce the wheel/ rail minimum adhesion coefficient and effective holding time of FM. The increase in the creepage would increase the adhesion coefficient and reduce the holding time. Under the wheel/rail contact stresses of 800 and 1100 MPa, the application of FM could reduce wheel/rail wear and damage. But under 1500 MPa, FM could cause serious rail surface damages. Moreover, the surface crack propagation process of rail mainly included three stages: initial stage, transition stage and rapid propagation stage. The "oil wedge effect" was the main mechanism for aggravating the surface damages of rail under 1500 MPa.

Keywords

Friction modifier; Application parameter; Adhesion coefficient; Wheel; rail damage

Authors

WANG, W.; LI, S.; DING, H.; LIN, Q.; GALAS, R.; OMASTA, M.; MELI, E.; GOU, J.; LIU, Q.

Released

15. 6. 2023

Publisher

ELSEVIER

Location

LAUSANNE

ISBN

0043-1648

Periodical

WEAR

Year of study

523

Number

June

State

Swiss Confederation

Pages count

15

URL

https://www.sciencedirect.com/science/article/pii/S0043164823002533

BibTex

@article{BUT185649,
  author="WANG, W. and LI, S. and DING, H. and LIN, Q. and GALAS, R. and OMASTA, M. and MELI, E. and GOU, J. and LIU, Q.",
  title="Wheel/rail adhesion and damage under different contact conditions and application parameters of friction modifier",
  journal="WEAR",
  year="2023",
  volume="523",
  number="June",
  pages="15",
  doi="10.1016/j.wear.2023.204870",
  issn="0043-1648",
  url="https://www.sciencedirect.com/science/article/pii/S0043164823002533"
}