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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" }