Abstract
Precipitation-hardened CuNiCrSi alloy was studied after the following treatments: (1) solution annealing, cold working and aging; (2) solution annealing and aging; (3) thermal simulation of diffusion bonding and annealing. In the first and second conditions, specimens were irradiated in the IVV-2M reactor to a dose of ∼0.35 dpa at 300°C. In the third condition, specimens were exposed to a dose of ∼0.2 dpa at 80°C, 200°C and 300°C. Results of irradiation tests performed at 300°C show that irradiation to a dose of ∼0.35 dpa cause loss of strength and embrittlement of the CuNiCrSi alloy in a high-strength state. The alloy in the third state becomes highly resistant to radiation embrittlement. Exposure at 200°C and 300°C to a dose of ∼0.2 dpa results in a substantial increase in the electrical conductivity of this material.
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