Abstract
The influence of irradiation in the BOR-60 reactor at 250–1020°C up to fluences 0.013–7.6 × 10 26 n/m 2 ( E > 0.1 MeV) on the mechanical properties of a number of low-alloyed Mo alloys has been studied. Zr, Ti, Ru, B, C were used as alloying elements. Significant radiation strengthening and embrittlement of all the alloys investigated took place during the course of irradiation. According to tension test results, the brittle—ductile transition temperature, T k, was 600–700°C. Under comparable irradiation conditions, alloying had no substantial effect on the extent of irradiation embrittlement, since it did not prevent the radiation defect formation causing strengthening and, therefore, embrittlement. It was assumed that improvement of the Mo radiation resistance could be only obtained by high alloying with such elements as rhenium.
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