Creep deformation and monotonic stress-strain behavior of Haynes alloy 556 at elevated temperatures


Creep and monotonic stress-strain behaviors of Haynes alloy 556 are studied and characterized at elevated temperatures using experimental results and analytical models. The Θ-Projection and Garofalo creep models describe the variations of the creep curve shape at different temperatures and stress levels reasonably well. The Θ-Projection method, however, results in accurate prediction of the rupture lives, while Garofalo model overestimates them. Both models provide fair predictions of minimum creep rate variations with stress at a given temperature. An incremental time method, which combines the time independent stress-strain data from standard tensile test with the creep data, is used to predict the stress-strain curve in slow-strain-rate tensile tests at elevated temperatures.

Publication Title

Journal of Materials Science