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Investigation of the Development of Irradiation - Induced Precipitates in VVER-440-Type Reactor Pressure Vessel Steels and Weld Metals During Irradiation and Annealing

Große, M.; Nitzsche, P.; Böhmert, J.; Brauer, G.
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.
  • Lecture (Conference)
    18th International Symposium "Effects of Radiation in Materials", Hyannis (USA), June 25 - 27, 1996, ASTM STP 1325

Permalink: https://www.hzdr.de/publications/Publ-559
Publ.-Id: 559