METHOD OF RECEIVING OF NANO-STRUCTURAL ALLOYS TITANIUM-NICKEL WITH EFFECT OF SHAPE MEMORY Russian patent published in 2009 - IPC C22F1/10 C22F1/18 B82B3/00 

FIELD: metallurgy.

SUBSTANCE: beforehand hardened alloy subject to cold deformation by means of multiple rolling with providing of total veritable degree of deformation e≥0.6 and annealing at temperature 250-550°C. Rolling is implemented with application to crumple zone of pulse current, parametres of which are variated in following intervals: current density 60-300 A/mm², pulse-repetition frequency 400-1200 Hz and pulse duration 40-200 microsecond. Each following single clamping at multiple rolling is implemented with change of direction. Rolling rate amounts 20-250 mm/s. Parametres of pulse current is variated at each stage of deformation, herewith it is used unidirectional pulse current.

EFFECT: creation in alloys of regulated parametres of nanocrystalline structure with increased complex of mechanical and functional properties, reduction of laboriousness of technical process for receiving of semi-finished products.

5 cl, 1 ex