Constitutive design equations for thermal creep deformation of HT-9

Thermal creep modeling of HT9 steel for fast reactor applications

“…The correlation by Amodeo and Ghoniem [5] employs the minimum commitment method (MCM) and uses time dependent creep strain curves at 873 K, as reported by Sandvik Steels [7]. The MCM is based on the observation that the 1% strain occurs during either the primary creep regime or at the beginning of the secondary creep regime, and that the 5% strain occurs at the boundary between the secondary and tertiary creep regimes.…”

“…The most widely accepted are the correlations developed by Amodeo and Ghoniem [5,6] and by Lewis and Chuang [7].…”

“…Although the thermal creep of HT9 has been studied for decades for both nuclear and non-nuclear applications [5][6][7][8][9], inconsistencies still exist in the correlations and the experimental data. In the present study, the test data available for the thermal creep tests of HT9 were assessed.…”