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A moving train subjects a rail cross section to many wheel passes and heat generation at the interface from bulk friction and microslip. Frictional heating at the interface causes the temperature of the contacting rail surface and wheel surface to rise. After the train has passed, the rail temperature drops to ambient till the next train arrives. Wheels, on the other hand, pick up the frictional heat...
Wear rate in a rail–wheel system has been found to be a function of temperature rise between the rail and wheel. The flash temperature due to frictional heating causes the development of thermal stresses and reduction of the material strength at the rail undergoing wear. This thermal effect leads to a rapid increase in wear rate, known as wear transition. Rail wear transition behaviour as a result...
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