A study of martensitic transformations and characteristics of the shape memory effect of medical alloys (TH-10) alloyed with aluminum up to 4 at.% Al long the TiNiMo-TiMeMo section was carried out. Aluminum has a fairly smooth effect on the temperatures of the beginning and end of the direct and reverse martensitic transformation, as well as similar characteristics under load, which makes it possible to use alloying with aluminum as a method for controlling the temperature range of shape change with the shape memory effect.

We have studied the structure and properties of porous nickel titanium (TiNi) alloys obtained upon reaction sintering of Ti and Ni powders with Co and Mo additives. It is established that Co and Mo doping additives retain the compaction of Ni powder achieved at the initial stage of sintering. The maximum deformation of porous samples loaded in the austenite state was observed upon adding Co, while the addition of Mo resulted in minimum deformation. The addition of Co leads to single-stage martensitic transformation in TiNi phase, while the addition of Mo leads to the two-stage transformation that is more homogeneous over the volume. Both Co and Mo additives lead to increase in the maximum accumulated strain due to the formation of favorably oriented stress-induced martensite and reoriented quench-induced martensite.