Features of radiation damage of vanadium and its alloys at a temperature of 330-340°C
Abstract
Microstructural changes of vanadium alloys after irradiation at 340°C to 12 dpa in the BOR-60 reactor in 7Li environment is analyzed. Materials are vanadium and its alloys V-3Ti, V-3Fe, V-6Cr, V-4Cr-4Ti, V-5Cr-10Ti, V-6Cr-1Zr-0.1C. Void formation was observed in the binary alloys V-3Fe, V-3Ti and V-6Cr. It is shown that three-four-fold increase in V-4Cr-4Ti yield stress is produced by the formation of dislocation loops (DLs) and fine radiation-induced precipitates (RIPs) with a density of 1.7×1017 cm-3. It is expected that embrittlement of the welds will be worse because density of DLs and RIPs is 1.4-1.6 times higher. Besides, invisible coherent or semi-coherent RIPs are formed in the fusion zone. Elemental maps of the rupture surface of irradiated V-4Cr-4Ti are presented.
- Publication:
-
Journal of Nuclear Materials
- Pub Date:
- December 2000
- DOI:
- 10.1016/S0022-3115(00)00218-X
- Bibcode:
- 2000JNuM..283..727K
- Keywords:
-
- V01;
- F04;
- N01;
- E03;
- R02