Influence of Head Hardening Process on Fracture Toughness in Rails
Fazil Hüsem M. Emre TURAN Hayrettin Ahlatçı
AbstractThis study aims to investigate fatigue crack growth and fracture toughness behavior in grooved rails. R260 grade and R260 grooved grade rails were used for analysis to understand effect of rail geometry on fracture properties of specimens. Fracture surfaces and microstructures of specimens were examined by the use of Scanning Electron Microscope(SEM) and Nikon Shuttlepix Digital Microscope. Results show that, fracture toughness and fatigue crack growth behavior are effected by the geometry of specimens due to plastic deformation mechanism on head parts.