SYMPOSIA PAPER Published: 01 January 1999
STP13874S

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

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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.

Author Information

Große, M
Research scientists the Institute for Safety Research at the Research Center Rossendorf Inc., Dresden, Germany
Nitzsche, P
Research scientists the Institute for Safety Research at the Research Center Rossendorf Inc., Dresden, Germany
Böhmert, J
Institute for Safety Research at the Research Center Rossendorf Inc., Dresden, Germany
Brauer, G
Research Center Rossendorf, Dresden, Germany
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Details
Developed by Committee: E10
Pages: 346–362
DOI: 10.1520/STP13874S
ISBN-EB: 978-0-8031-5395-0
ISBN-13: 978-0-8031-2614-5