[1C04-07] Stainless Steel 1

[1C04] Fundamental technology development for evaluation of thermally ageing embrittlement of stainless steel welds used as pressure boundaries in nuclear power plants

(5) Summary

*Yutaka Watanabe¹, Toshiaki Horiuchi², Satoshi Minamoto³, Hiroshi Abe¹, Masato Koshiishi⁴ (1. Tohoku University, 2. Hokkaido University of Science, 3. NIMS, 4. NFD)

Keywords:Austenitic stainless steels, Weld metal, Thermal embrittlement

The hardening behavior and microstructural changes in ferrite phase of thermally aged austenitic stainless steel welds, and the effect of neutron irradiation on above microstructural changes were investigated. The scientific calculation methods for prediction of microstructural changes by thermal aging were also developed. In here, the summary will be presented.