Burmak A. Forming of the structurally-phase states at ultrasonic impact treatment and mechanical properties of surface of aluminium alloy of D16

This work is dedicated to development of new methods of ultrasonic impact modification of surface of light construction alloys in different environments and synthesis by means of UIT of nanocomposite coverages (Hv100=10 GPа) of deformation origin with increased (to ~5 times), by comparison to the initial surface of alloy of D16, tribotechnical properties. Cyclic character of changes of microhardness is educed depending on amplitude and duration of UIT on air and in an inert environment, which consists in the duty of the stages of strengthening, conditioned by structurally-phase transformations, and stages of plastification due to motion of disipate processes of the dynamic returning and dynamic recrystalization. Unique possibility of strengthening of surface of alloy of D16 (to 5 times) is shown UIT in liquid nitrogen. World-modeling is offered in relation to the structurally-phase mechanisms of strengthening of surface of alloy of D16 in chemically active and neutral environments. Keywords: ultrasonic impact treatment (UIT), aluminium alloy, quasi-hydrostatic pressure, nearsurface layer, cryodeformation, deformation nanocomposite.