PROCEDURE FOR FORMATION OF STRUCTURE OF LIGHT NON-FERROUS ALLOY WITH SUPER-PLASTIC PROPERTIES Russian patent published in 2011 - IPC C22F1/00 

FIELD: metallurgy.

SUBSTANCE: procedure consists in alloy grains deformation crumbling by intense plastic deformation of alloy with equip-channel angular press forming Equip-channel angular press forming is performed at rate of deformation chosen from interval = 0.1-1.0 mm/sec and temperature of deformation T_ECAPF determined from ratio: , where T_m is absolute temperature of alloy melting, k is Boltzmann constant, Q*_b is energy of activation of diffusion along non-equilibrium borders of grains, D*_b0 is pre-exponential factor of diffusion coefficient along non-equilibrium borders of grains, Z₁ and Z₂ are calculated model parameters of non-equilibrium state of structure of alloy depending on its chemical and phase composition. Also, for aluminium alloys Z₁=0.41 m^3/2 and Z₂=6.5·10^-8 m^3/2, while for magnesium alloys Z₁=0.49 m^3/2 and Z₂=10.7·10^-8 m^3/2.

EFFECT: raised process level and efficiency of formation of structure of light non-ferrous alloys with maximal super-plastic properties by deformation crumbling their grain structure and by formation of non-equilibrium state of grain borders.

3 cl, 1 ex