2018 Fall Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 502-1 Nuclear Materials, Degradation, Radiation Effects, and Related Technology

[1C04-07] Stainless Steel 1

Wed. Sep 5, 2018 10:50 AM - 11:55 AM Room C (B21 -B Building)

Chair:Katsuhiko Fujii(INSS)

11:05 AM - 11:20 AM

[1C05] Fundamental technology development for evaluation of thermally ageing embrittlement of stainless steel welds used as pressure boundaries in nuclear power plants

(6)Effects of thrmal aging and neutron irradiation on microstructural changes of stainless steel welds

*Hiroshi Abe1, Yutaka Watanabe1, Kazuma Hirata1, Takamichi Miyazaki1, Masato Koshiishi4, Toshiaki Horiuchi2, Satoshi Minamoto3 (1. Tohoku Univ, 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 were investigated. The results of atom probe tomography characterization suggested that spinodal decomposition and G-phase formation were accelerated in the aged and irradiated welds in comparison with only aged welds.