Fracture of Alloy Steels with Temperature Dependent Material Properties under Thermal Gradient and Cryogenic Temperature

Effects of temperature dependent material properties on mixed mode crack tip parameters of stainless steels that are subjected to sever thermal loading and presence of cryogenic temperature is investigated. Based on Jk-integral method and implementation of parameters for temperature dependent material properties, Jk-integral formulation is modified. Temperature fields and mixed mode stress intensity factors, are computed by means of finite element method. Adequate thermomechanical calculation and analysis are performed including temperature dependent material properties. Presented results shows that influence of temperature variable material properties which is more realistic, have reasonable effect on mixed mode crack tip parameters of stainless steels under sever thermal gradient.