METHOD OF RECEIVING OF NANO-STRUCTURAL ALLOYS TITANIUM-NICKEL WITH EFFECT OF SHAPE MEMORY

摘要

FIELD: metallurgy. ^ SUBSTANCE: beforehand hardened alloy subject to cold deformation by means of multiple rolling with providing of total veritable degree of deformation eëÑ0.6 and annealing at temperature 250-550C. 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