Evaluation of inelastic constitutive models under plasticity-creep interaction for 2 1/4Cr-1Mo steel at 600deg C

Uniaxial tests to identify plasticity-creep interaction in 2 1/4Cr-1Mo steel at 600deg C were carried out as the Benchmark Project by the Subcommittee on Inelastic Analysis and Life Prediction, JSMS. The purpose of this paper is to present recent experimental data and predictions of constitutive models obtained in the project. Ten types of constitutive models were utilized to compare analytical predictions to sixteen benchmark experiments which are grouped into four categories: (I) tensile and creep tests under monotonic loading, (II) mixed mode tests under plastic and creep loading, (III) ratcheting deformation tests under program loads, and (IV) cyclic deformation tests under the combination of different strain rates. The benchmark tests in Group IV are used to estimate the creep-fatigue life of 2 1/4Cr-1Mo steel; the results will be published in a separate paper