Residual Stress Distribution in R220 and R260 Grade Grooved Rails
M. Emre TURAN Yavuz Sun Fazil Hüsem
AbstractThis study aims to determine residual stress distribution in head, web and foot parts of two different quality grooved rails and also to understand effect of carbon content on residual stress in rails. Strain gauges were glued on three regions of specimens and cutting method was applied for residual stress measurement according to the TS EN 13674-1 railway rail standard. Scanning Electron Microscope (SEM) and Optic Microscope (OM) were used for microstructure analysis of regions where the residual stress measurements were performed. Results show that, compressive residual stress is an effective stress type compared to the R260 grade rails. However, R260 grade grooved rails have higher residual stress value than R220 grade grooved rails especially in head parts of specimens.