Farid Vakili-Tahami - Associate Professor, University of Tabriz
Mohammad Reza Adibeig - M.S Student, University of Tabriz
Hassan Akhani - M.S Student, University of Tabriz
Mohammad Zehsaz - Associate Professor, University of Tabriz

In this paper, the creep behavior and constitutive equation of Inconel ۷۱۸, which has been produced in IRAN, have been determined using experimental data. For this purpose, test samples have been machined from as received bars and their creep behavior and properties have been examined by conducting uni-axial creep tests. Constant temperatures and constant load uni-axial creep tests have been carried out at two temperatures of ۶۶۰ and ۶۷۵°C, subjected to constant loads, which produce initial stresses ranging from ۴۹۰ to ۶۹۰ MPa that are below the yield stress. The experimental data have been used to obtain the creep constitutive parameters using numerical optimization techniques. Also, based on these results, the quality of the domestic produced superralloy has been verified and it has been shown that its characteristics match with the international standards.

Creep, Constitutive Equation, Superalloy, Inconel ۷۱۸