Influence of neutron irradiation on CuNiCrSi alloy pre-implanted with helium

He-implanted samples were irradiated in the IVV-2M reactor at 80 degreesC a nd at 300 degreesC up to similar to0.3 dpa. Samples without implantation we re also irradiated at 300 degreesC for comparison. Structural investigation s were performed and mechanical properties determined after neutron irradia tion as well as on unirradiated samples. Unirradiated He-implanted samples showed higher strength properties than unimplanted samples at room temperat ure. The plasticity of implanted samples was lower by 1.2 times. The differ ence of strength disappeared at 300 degreesC and the total elongation of im planted samples decreased by 2 times in comparison with unimplanted samples . (C) 2000 Elsevier Science B.V. All rights reserved.