[2I01-07] Stainless Steel

[2I04] Fundamental technology development for evaluation of thermally ageing embrittlement of stainless steel welds used as pressure boundaries in nuclear power plants

(1)Summary

*Yutaka Watanabe¹, Toshiaki Horiuchi², Satoshi Minamoto³, Yoichi Takeda¹, Hiroshi Abe¹ (1. Tohoku University, 2. Hokkaido University of Science, 3. NIMS)

Keywords:Austenitic stainless steels, Weld metal, Thermal embrittlement

Changes in microstructure of ferrite phase in austenitic stainless steel welds due to thermal aging was investigated. Prediction methods for spinodal decomposition and G-phase precipitation will be proposed. Effect of neutron irradition on microstructural changes was also discussed.