The effect of neutron irradiation on beryllium performance

摘要

This paper considers the effect of neutron irradiation on the performance of six beryllium grades (DshG-200, TR-60, TshG-56, TRR, TE-30, TIP-30) fabricated by VNIINM, Russia, and one fabricated by Brush Wellman, USA, S-65. The average grain size of the beryllium grades investigated varied from 8 to 40 μm, beryllium oxide content was 0.7-3.2 wt./100, initial tensile strength 250-680 Mpa. All the specimens were irradiated in the active zone of a SM-3 reactor at 650-700 deg.c up to the fast neutron fluence (5.5-6.2) x10~21 cm~-2 (helium content up to 1150 appm), E> 0.1 MeV.