A creep model based on normalized parameters

In view of the deficiency that the traditional creep models, e.g. the Nortons law, cannot be used to simulate the third stage of creep, a creep model based on normalized time as a variable and the normalized stress and normalized temperature as parameters was presented. The developed model could describe all three stages of the creep curves. On the basis of the developed model, an improved model was put forward to describe the first stage of the creep curves better. Then feasibility of the developed model was validated by use of the experimental data of the direct aged GH4169G.The relationship between the parameters of the developed model and the dimensionless temperature，dimensionless stress was established. And the models can be used in finite element software, showing that the model can be applied to simulate the creep behavior of realistic structure.