[1C04-07] Stainless Steel 1

[1C06] Fundamental technology development for evaluation of thermally ageing embrittlement of stainless steel welds used as pressure boundaries in nuclear power plants

(7) Development of prediction model for G phase precipitation

*Toshiaki Horiuchi¹, Satoshi Minamoto², Masato Koshiishi³, Hiroshi Abe⁴, Yutaka Watanabe⁴ (1. HUS, 2. NIMS, 3. NFD, 4. Tohoku Univ.)

Keywords:dual-phase stainless steel, G phase, thermodynamic calculation, phase stability, precipitation behavior

Thermodynamic equilibrium calculation and precipitation simulation were performed in order to estimate the effect of thermal aging under irradiation on the stability of G-phase. The results show good agreement with the experimental data obtained in the present study. Various information related to G-phase will be estimated by the model developed in the present study.