V.V. Ovchinnikov, N.V. Guschina, S.M. Mozharskij, L.I. Kaigorodova

It is provided the study of overpatching the phase composition of aluminum alloy of Al-Li-Mg-Cu-Zr-Mn under the influence of accelerated ion beams.The study considers that under irradiation in the alloy it is initiated the decomposition of the supersaturated solid solution with the forming a dispersion of nanoscale precipitate particles θ '(Al2Cu) and S1 (Al2LiMg).Near the irradiated surface of the sample there is a large amount of particles in S1-phase (Al2LiMg) with an average diameter of 100 ... 200 nm and a minor amount of this phase particle of about 10 nm.The degree of decomposition of the solid solution increases with the growth of irradiation dose. This explains the significant hardening of the alloy while maintaining a sufficiently high level of plasticity.When irradiated by Ar + ions with an elecrticity of 20 keVit is observed the dissolution b' (Al3Zr) and δ' (Al3Li) phases throughout the bulk of the sample of 1 mm thick, and the reduction in size and partial dissolution of intermetallic of crystallization origin Al8Fe2Si.Radiation-induced recrystallization and alteration of intermetallic composition of the metal can form the basis of technology of fast "cold" radiation annealing alloys with controlled strength while maintaining a high level of plasticity.