Abstract
The effects of γ-irradiation on heterogeneous short-range order (HSO) formation in a deformed Fe+12 at.% Al alloy and on the alloy structural stability were investigated in this work. It is established that HSO formation is accelerated under irradiation and the activation energy of this process is decreased by ∼10% under the effect of γ-irradiation at 1500 R/s (∼10 −13 dpa/s). The efficiency of the γ-irradiation effect on HSO formation depends on the alloy heterogeneity and temperature under irradiation. Additional ordering is shown to take place under γ-irradiation in Fe+12 at.% Al alloy with preformed HSO. The possible mechanisms of the observed phenomena are discussed. Additional alloy ordering determined by increase of supplementary vacancy source efficiencies under γ-flux is proposed.
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