Peculiarities of Transition-Zone Formation at Al–Cu Explosion Welding

The formation of transition zones during explosive welding of aluminium with copper in vacuum and in air is studied.The distribution of element concentrations is used to determine the coefficient of mutual mass transfer in the undetachable Al-Cu joint.It turns out that the mass transfer of copper into aluminium in the conditions of explosion welding occurs at greater depths compared to the depth of penetration of aluminium into copper.This is explained by the fact that the nature of the penetrating atoms does not have such a strong influence as in conditions of diffusion annealing, and the determining factor is the lattice period, which in aluminium is larger than in