首页|Failure analysis of pearlitic rail steel with internal macrocrack after long-term operation
Failure analysis of pearlitic rail steel with internal macrocrack after long-term operation
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NSTL
Elsevier
During operation, various physical and mechanical processes occur in the metal of the rails under cyclic force action over time: plastic deformation of the rail rolling surface, the formation of internal and surface cracks, changes in residual stresses, etc. As a result, the mechanical characteristics degrade and the performance of the rails decreases. A microstructural analysis of the cross-section surface of six rails with internal cracks-longitudinal and transverse ones-has been performed. The rail samples were taken out of attendance after many years of service. Fractographic analysis of the crack surface and the surrounding material indicates a significant degradation of the physical and mechanical properties of the rail steel and intensive structure formation during long-term operation of the rails. The added value of this research is analysis of the fracture surfaces taken from components in service.
NSTL
Elsevier
