Investigation of the development of irradiation-induced precipitates in VVER-440 type reactor pressure vessel steels and weld metals after irradiation and annealing
Conference
·
OSTI ID:679495
- Inst. for Safety Research, Dresden (Germany). Neutron Embrittlement Div.
- TU Dresden (Germany). Positron Group
The development of irradiation-induced precipitates in VVER-440 type reactor pressure vessel steels 15Kh2MFA and weld metals SV-10KhMFT during irradiation and post-irradiation annealing is studied by small angle neutron and X-ray scattering. The kinetic conditions for the precipitation of particles, which already exist in the unirradiated state, seem to be improved at temperatures of about 270 C due to the irradiation. The size distribution of the irradiation-induced precipitates depends on the copper content and differs between weld and base metal. A strong correlation between the formation of irradiation-induced precipitates and the irradiation hardening is found. The hardness nearly linearly depends on the number of these precipitates.
- OSTI ID:
- 679495
- Report Number(s):
- CONF-960643--
- Country of Publication:
- United States
- Language:
- English
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