Abstract
Research efforts are focused on improving the creep properties of superalloys for extending its life-time at high temperatures. During the development of new superalloys, due to extensive investigation of creep properties, the use of computational techniques for prediction of creep properties is desirable. Young-Kwang Kim used a mathematical model to predict creep properties of nickel-based superalloys at intermediate temperature ranges from CALPHAD thermodynamic calculations. N. Saunders used JMatPro to predict the creep properties such as steady creep rate, rupture life and rupture strength. In the present study, Norton-Bailey power law is used to predict the creep properties of a turbine blade test specimen made of nickel-based superalloy named Inconel 718 Alloy at an intermediate temperature by using ANSYS software. The calculated minimum creep strain displayed a steady increase with time (200 hours) and steady state creep rate linearly increased with constant temperature and stress. Dislocation creep mechanism is predicted to be dominant at higher stress & temperatures and validated with a deformation mechanism map.