Development of shape memory and superelasticity in binary TiNi-based alloys under torsion of samples with B19′ structure

The paper presents the results of studies of inelastic strains (shape memory effect (SME) and superelasticity (SE)) and plastic deformation developed under torsion in specimens of TiNi-based alloys with Ni content of 50.2 and 50.8 at. %, characterized by the initial B19′ structure of the martensite phase. It was shown that both SME (10–14%) and SE (5–6%) had been observed in plastically deformed samples of these alloys. The factors determining SE development in specimens of TiNi-based alloys with B19′ martensite structure during deformation are discussed.The paper presents the results of studies of inelastic strains (shape memory effect (SME) and superelasticity (SE)) and plastic deformation developed under torsion in specimens of TiNi-based alloys with Ni content of 50.2 and 50.8 at. %, characterized by the initial B19′ structure of the martensite phase. It was shown that both SME (10–14%) and SE (5–6%) had been observed in plastically deformed samples of these alloys. The factors determining SE development in specimens of TiNi-based alloys with B19′ martensite structure during deformation are discussed.