MECHANISMS OF CHANGE OF SHAPE IN DEFORMING AND HEATING TITANIUM-ALLOYS WITH THE SHAPE-MEMORY EFFECT

Alloys with the shape memory effect based on titanium nickelide are we ll known and used quite widely in medicine, aircraft and spacecraft en gineering, and other fields of mschine building. These alloys are used in creating thermomechanical parts of structures, temperature-sensiti ve gauges, and thermoregulators. Titanium alloys with the shape memory effect that possess high damping properties are used when vibrations and noise have to be limited in order to provide effective operation o f machine parts and engineering systems as a whole. Commercial titaniu m-base alloys have lower characteristics of shape regeneration than al loys based on titanium nickelide. However, commercial alloys are much less expensive and are used to produce a wide range of semifinished pr oducts. In these materials the characteristics of shape regeneration a nd damping are often determined by the mechanism of change of shape in deformation, which has not yet been studied appropriately. The presen t work is devoted to the mechanisms of inelasticity in titanium alloys in various stages of the action of the shape memory effect.