EFFECT OF SEVERE PLASTIC DEFORMATION AND SUBSEQUENT ANNEALING ON THE STRUCTURE AND PROPERTIES OF THE CU72AU24AG4 AND CU59AU33AG7FE1 ALLOYS
A microstructure andmechanical properties of the Cu72Au24Ag4 and Cu59Au33Ag7Fe1 alloys in a nanocrystalline state after severe plastic deformation by high-pressure torsion and subsequent annealing were studied by means of transmission and scanning electron microscopyand measurements of microhardness. The nanostructured state structure of the alloys was obtained. As a result of some annealing of alloys along with aging the ordering processes start. The features of the structure, properties of alloys after a preliminary deformation and subsequent annealing were compared. The influence ofthe degree of deformation, subsequent annealing temperature on the mechanical properties was studied. An increase in the breaking effect of the growth of nanograin by the barrier action of dispersed precipitates was observed.