21/4Cr-1Mo鋼の純クリープ・疲労相互作用の有効応力概念に基づく評価の試み

概要

論文の詳細を見る
The pure creep-fatigue bebavior of 2 1/4 Cr-1Mo steel at 550℃ was analyzed by a damage model which was originally developed by the authors for an evaluation of the pure creep-fatigue behavior of 304 Steel at 650℃. The model consists of two damage parameters, that is, the time-independent damage parameter D_I and the time-dependent damage parameter D_D. The applicability of the model to 2 1/4 Cr-1Mo Steel was checked and the model was modified as follows. a) D_I was modified so that it could describe the effect of mean stress. b) D_D was determined as a time integration of the internal stress instead of the overstress It was shown that the above modifications made possible a more reasonable evaluation of the pure creep-fatigue behavior of 2 l/4 Cr-1Mo steel at the temperature.
社団法人日本機械学会の論文
1989-06-25