Void hyperlattices in high-purity aluminium irradiated with fast neutrons

Abstract

Void hyperlattices have been obseved in high-purity (99.9999%) aluminium irradiated with fast neutrons at 323 K to a dose level of 2 × 1026 n/m2. Void ordering is found to occur at a much lower void density and with a void lattice-spacing considerably larger than hitherto reported in the literature. In spite of void ordering, voids appear to maintain a healthy growth rate. Implications of these observations are briefly discussed.