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Adhesion and damage characteristics of wheel/rail using different mineral particles as adhesion enhancers
- Source :
- Wear. 477:203796
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- 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.
- Subjects :
- Materials science
Adhesion coefficient
Uniaxial compression
chemistry.chemical_element
02 engineering and technology
Zinc
Rail wear
engineering.material
0203 mechanical engineering
Materials Chemistry
Mineral particles
Composite material
musculoskeletal, neural, and ocular physiology
Spinel
Surfaces and Interfaces
Adhesion
021001 nanoscience & nanotechnology
Condensed Matter Physics
Surfaces, Coatings and Films
020303 mechanical engineering & transports
chemistry
Mechanics of Materials
engineering
Particle
0210 nano-technology
human activities
Subjects
Details
- ISSN :
- 00431648
- Volume :
- 477
- Database :
- OpenAIRE
- Journal :
- Wear
- Accession number :
- edsair.doi...........10376400435b9c4606166318d6241e1b