Factors affecting fracture toughness of R7T steel

Abstract

Fracture toughness is an important material property that resists the complete fracture or extends the subject's life even after the presence of defects or after initialization of failure or fracture. So, because of that, how affects the mechanical properties and factors to the fracture toughness is essential. R7T steel is substantial steel that is mainly used for the railway wheel and other applications. We used Linear-elastic plane-strain fracture toughness KIc of Metallic materials method with compact tension specimen to relate the effect of mechanical properties and other factors. With the help of linear-elastic plane-strain fracture toughness KIc of Metallic materials method and microstructure evolution. We relate the microstructure and mechanical properties like yield strength, Ultimate tensile strength with fracture toughness. The results indicate that yield strength and tensile strength are effects thoroughly fracture toughness. Moreover, microstructure also important because R7T steel is a family of medium carbon steel.