This paper studies the accuracy of a technique which is capable of predicting and modeling a wide range of creep life in Ni-based superalloys. The h-projection method was applied to characterize the creep behavior of the Ni-based superalloy IN-792 at 800 C. Constant load creep tests have been carried out over a wide range of loads at the constant operating temperature. Creep curves were fitted using either 4-h or 6-h equation by the use of a nonlinear least-square technique. The results showed that both 4- and 6-h projection parameters revealed a good linearity as a function of stress. Comparison of experimental creep curves with those predicted using both of the utilized h-projection techniques showed that the techniques fit the experimental data at high strain values very well while the 6-h approach describes much better the creep curves at low strain region. [DOI: 10.1115/1.4026035]

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