Publication result detail

Rheological and tribological performance of top-of-rail friction modifiers with different viscosities

WU, B.; SHI, L.; LI, J.; DING, H.; GALAS, R.; OMASTA, M.; GUO, J.; WANG, W.; HARTL, M.

Original Title

Rheological and tribological performance of top-of-rail friction modifiers with different viscosities

English Title

Rheological and tribological performance of top-of-rail friction modifiers with different viscosities

Type

WoS Article

Original Abstract

Friction modifier (FM) in the rail/wheel applications is a special lubrication material that could be applied between the top of rail and the tread of wheel. The application of FM brings many benefits to the wheel-rail interface such as reducing noise, alleviating wheel-rail wear and mitigating corrugation. Viscosity is an important parameter to reflect fluid properties of FM materials. In this study, FM samples with different viscosities were prepared by changing the content of sodium carboxymethyl cellulose (CMC). The tribological and rheological performance of these FM samples were explored using the twin-disc testing machine and rotational rheometer. Furthermore, the relationship between the tribological and rheological results were tried to establish. The results showed that the increase in the content of CMC could increase the viscosity of FM and enhance the solid-like characteristic of FM, which could help FM reduce coefficient of adhesion (COA) level and wheel-rail damage. For the FM material developed in this study, the rational applying amount and the range of viscosity were about 15 mu L/time and 200 Pa.s to 400 Pa.s, respectively, considering the factors of wheel-rail adhesion, wear, potential waste and pumping process in the practical application.

English abstract

Friction modifier (FM) in the rail/wheel applications is a special lubrication material that could be applied between the top of rail and the tread of wheel. The application of FM brings many benefits to the wheel-rail interface such as reducing noise, alleviating wheel-rail wear and mitigating corrugation. Viscosity is an important parameter to reflect fluid properties of FM materials. In this study, FM samples with different viscosities were prepared by changing the content of sodium carboxymethyl cellulose (CMC). The tribological and rheological performance of these FM samples were explored using the twin-disc testing machine and rotational rheometer. Furthermore, the relationship between the tribological and rheological results were tried to establish. The results showed that the increase in the content of CMC could increase the viscosity of FM and enhance the solid-like characteristic of FM, which could help FM reduce coefficient of adhesion (COA) level and wheel-rail damage. For the FM material developed in this study, the rational applying amount and the range of viscosity were about 15 mu L/time and 200 Pa.s to 400 Pa.s, respectively, considering the factors of wheel-rail adhesion, wear, potential waste and pumping process in the practical application.

Keywords

Friction modifier; Wheel-rail adhesion; Damage; Rheology

Key words in English

Friction modifier; Wheel-rail adhesion; Damage; Rheology

Authors

WU, B.; SHI, L.; LI, J.; DING, H.; GALAS, R.; OMASTA, M.; GUO, J.; WANG, W.; HARTL, M.

RIV year

2025

Released

15.02.2024

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE

ISBN

0043-1648

Periodical

WEAR

Volume

538

Number

February

State

Swiss Confederation

Pages count

15

URL

https://www.sciencedirect.com/science/article/pii/S0043164823006129

BibTex

@article{BUT191127,
  author="Bingnan {Wu} and Lubing {Shi} and Jiaxin {Li} and Haohao {Ding} and Radovan {Galas} and Milan {Omasta} and Jun {Guo} and Wenjian {Wang} and Martin {Hartl}",
  title="Rheological and tribological performance of top-of-rail friction modifiers with different viscosities",
  journal="WEAR",
  year="2024",
  volume="538",
  number="February",
  pages="15",
  doi="10.1016/j.wear.2023.205229",
  issn="0043-1648",
  url="https://www.sciencedirect.com/science/article/pii/S0043164823006129"
}