In this work differnet RF beryllium grades were irradiated in the BOR-60 reactor to a dose of approx 5-10 dpa at irradiation temepratures 350, 420, 500, 800 deg C. Irradiation at temperatures of 350 - 400 deg C is shown to result in Be hardening due to the accumulation of radiation defect complexes. Hardening is accompanied with a sharp drop in plasticity at T_test<=300 deg C. A strong anisotropy in plasticity has been found at a mechanical testing temperature of 400 deg C and this parameter may be preferable when the samples cut are crosswise to the pressing direction.
展开▼
