Pre-precipitation rate in Al‐10% Zn alloy neutron-irradiated at 78°K

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Abstract
The effect of a neutron irradiation at 78°K on the rate of pre-precipitation in Al-10% Zn alloy has been investigated by means of resistivity measurements. From the interpretation of the results it appears that whereas interstitial-type defects do not produce clustering of Zn atoms, during the recovery of vacancy-type defects an appreciable initial enhancement in the rate of clustering process is detected, depending on the thermodynamic state of the alloy. However, due to rapid elimination of the defects, after a certain ageing time, the rate of the process in an irradiated alloy becomes slower than in a quenched alloy.