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On the wear and damage characteristics of rail material under low temperature environment condition
- Source :
- Wear. :149-158
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- This study presents the wear and damage behaviours of U71Mn rail material with a friction pair of ER8 wheel material under different temperature conditions, which were explored using a rolling-sliding wear testing device. It turns out that, compared to those at 20 °C room temperature, the adhesion coefficient, wear rate and hardness all increase at low temperatures. Meanwhile, three types of damage mechanisms are proposed according to wear and rolling contact fatigue (RCF) behaviours under different temperature conditions: (a) room temperature (RT) damage mechanism, (b) ductile-brittle transition temperature (DBTT) damage mechanism, (c) below ductile-brittle transition temperature (BDBTT) damage mechanism. With the temperature decreasing from room to low temperature, the wear mechanism transforms from abrasive wear to adhesive wear and surface fatigue. Meanwhile, the rail material gradually becomes brittle and the subsurface damage at low temperature is more serious than that at room temperature. Furthermore, the subsurface damage at −15 °C is the worst. At low temperature, there is a wider size range of wear debris than that at room temperature.
- Subjects :
- Surface fatigue
Materials science
Adhesion coefficient
Transition temperature
Abrasive
Metallurgy
Rolling contact fatigue
02 engineering and technology
Surfaces and Interfaces
Wear testing
021001 nanoscience & nanotechnology
Condensed Matter Physics
Surfaces, Coatings and Films
020303 mechanical engineering & transports
Brittleness
0203 mechanical engineering
Mechanics of Materials
Materials Chemistry
Adhesive wear
0210 nano-technology
Subjects
Details
- ISSN :
- 00431648
- Database :
- OpenAIRE
- Journal :
- Wear
- Accession number :
- edsair.doi...........52e5b6e1556b038e31a318c717179f97