Detail publikačního výsledku

Adhesion and damage characteristics of wheel/rail using different mineral particles as adhesion enhancers

WANG, C.; SHI, L.B.; DING, H.H.; WANG, W.J.; GALAS, R.; GUO, J.; LIU, Q.Y., ZHOU, Z.R., OMASTA, M.

Originální název

Adhesion and damage characteristics of wheel/rail using different mineral particles as adhesion enhancers

Anglický název

Adhesion and damage characteristics of wheel/rail using different mineral particles as adhesion enhancers

Druh

Článek WoS

Originální abstrakt

Mineral particles are used to improve adhesion between wheel and rail, but they might lead to severe damages of wheel and rail surfaces. To investigate the adhesion enhancement phenomena and damages of both wheel and rail induced by adhesion enhancers, the crushing strengths of four types of mineral particles (zinc oxide, sand, spinel and alumina) were firstly explored on a uniaxial compression tester. Then the adhesion, wear and damage of wheel/rail were studied on a twin-disc machine under the wet condition. The results show that the characteristic crushing strength was 24 MPa for zinc oxide, 40 MPa for sand, 51 MPa for spinel and 73 MPa for alumina, respectively. For particle with the lowest crushing strength (zinc oxide), the adhesion coefficient was the lowest (around 0.20). With the increase in the crushing strength to 40 MPa, the adhesion coefficient was improved to around 0.28. The particles with higher crushing strengths induced larger wheel/rail wear rates and severer rolling contact fatigue (RCF) damages on wheel and rail. The RCF cracks were large in lengths but small in angles, which finally developed into large pieces of material peeling off from the surface. Sand was the most suitable adhesion enhancer considering its good adhesion enhancement and the relatively mild damage on wheel/rail materials.

Anglický abstrakt

Mineral particles are used to improve adhesion between wheel and rail, but they might lead to severe damages of wheel and rail surfaces. To investigate the adhesion enhancement phenomena and damages of both wheel and rail induced by adhesion enhancers, the crushing strengths of four types of mineral particles (zinc oxide, sand, spinel and alumina) were firstly explored on a uniaxial compression tester. Then the adhesion, wear and damage of wheel/rail were studied on a twin-disc machine under the wet condition. The results show that the characteristic crushing strength was 24 MPa for zinc oxide, 40 MPa for sand, 51 MPa for spinel and 73 MPa for alumina, respectively. For particle with the lowest crushing strength (zinc oxide), the adhesion coefficient was the lowest (around 0.20). With the increase in the crushing strength to 40 MPa, the adhesion coefficient was improved to around 0.28. The particles with higher crushing strengths induced larger wheel/rail wear rates and severer rolling contact fatigue (RCF) damages on wheel and rail. The RCF cracks were large in lengths but small in angles, which finally developed into large pieces of material peeling off from the surface. Sand was the most suitable adhesion enhancer considering its good adhesion enhancement and the relatively mild damage on wheel/rail materials.

Klíčová slova

mineral particles; crushing strength; wheel/rail adhesion; wear; rolling contact fatigue

Klíčová slova v angličtině

mineral particles; crushing strength; wheel/rail adhesion; wear; rolling contact fatigue

Autoři

WANG, C.; SHI, L.B.; DING, H.H.; WANG, W.J.; GALAS, R.; GUO, J.; LIU, Q.Y., ZHOU, Z.R., OMASTA, M.

Rok RIV

2022

Vydáno

18.07.2021

Nakladatel

Elsevier

Místo

Nizozemsko

ISSN

0043-1648

Periodikum

WEAR

Svazek

477

Číslo

8

Stát

Švýcarská konfederace

Strany od

203796

Strany do

203796

Strany počet

12

URL

https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S004316482100185X

BibTex

@article{BUT171616,
  author="WANG, C. and SHI, L.B. and DING, H.H. and WANG, W.J. and GALAS, R. and GUO, J. and LIU, Q.Y., ZHOU, Z.R., OMASTA, M.",
  title="Adhesion and damage characteristics of wheel/rail using different mineral particles as adhesion enhancers",
  journal="WEAR",
  year="2021",
  volume="477",
  number="8",
  pages="203796--203796",
  doi="10.1016/j.wear.2021.203796",
  issn="0043-1648",
  url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S004316482100185X"
}