Some observations of dislocation channelling in irradiated iron

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Abstract
Dislocation channelling in iron irradiated to a fast fluence of 8 × 1019 n/cm2 (E > 1 Mev) is shown to be visible by virtue of dislocation arrays densely packed on slip planes. Such highly localized deformation in irradiated iron is shown to be in marked contrast to the dense tangles and cell walls which develop in unirradiated iron deformed to a comparable strain. Analysis of the slip band geometry shows the active systems in the irradiated iron to be consistent with slip on {110} and {112} planes in a 〈111〉 direction.