Microstructural observations of HFIR-irratiated austenitic stainless steels including welds from JP9-16
Austenitic stainless steels, including specimens taken from various electron beam (EB) welds, have been irradiated in HFIR Phase II capsules, JP9-16. Fifteen specimens irradiated at 300, 400, and 500{degrees}C up to 17 dpa are so far examined by a transmission electron microscope (TEM). In 300{degrees}C irradiation, cavities were smaller than 2nm and different specimens showed little difference in cavity microstructure. At 400{degrees}C, cavity size was larger, but still very small (<8 nm). At 500{degrees}C, cavity size reached 30 nm in weld metal specimens of JPCA, while cold worked JPCA contained a small (<5 nm) cavities. Inhomogeneous microstructural evolution was clearly observed in weld-metal specimens irradiated at 500{degrees}C.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- OSTI ID:
- 270450
- Report Number(s):
- DOE/ER--0313/19; ORNL/M--5023; ON: DE96010874
- Country of Publication:
- United States
- Language:
- English
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