[2I01-07] Stainless Steel

[2I06] Fundamental technology development for evaluation of thermally ageing embrittlement of stainless steel welds used as pressure boundaries in nuclear power plants

(3)Development of prediction model for G phase precipitation

*Toshiaki Horiuchi¹, Satoshi Minamoto², Hiroshi Abe³, Yoichi Takeda³, Yutaka Watanabe³ (1. Hokkaido University of Science, 2. National Institute for Materials Science, 3. Tohoku University)

Keywords:G phase, thermodynamic calculation, phase stability, precipitation behavior

Thermodynamic equilibrium calculations were carried out for two types of dual-phase stainless steel to evaluate the influence of the temperature and constituent elements on the stability of the G phase. It was found that the stability of the G phase is dependent on the Ni, Mn, Cr, Si and Mo content.