Determination of Activation Energy and Prediction of Long-Term Strength of Creep Rupture for Alloy Inconel 740/740H: A Method Based on a New Tensile Creep Rupture Model

Authors：Chen, L.; Dong, Z.; Song, X. L.; Jia, J.; Xiang, Z. D.^*

Source：Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science , 2022, 53(1): 1-5.

DOI：10.1007/s11661-021-06484-2

• MECHANICAL-PROPERTIES
• LIFETIMES
• EVOLUTION

The activation energy of creep rupture is determined based on a new tensile creep rupture model and then applied to rationalize the creep rupture data measured over a wide range of stresses and temperatures, which enabled the predictions of 100,000 hours and 200,000 hours creep rupture strengths to be made at different temperatures in the range of 650 degrees C to 875 degrees C for alloy Inconel 740/740H. The reliability of such long-term predictions is also analyzed.