Generation, development and degradation of the intrinsic two-way shape memory effect in different alloy systems

Effect of low-temperature precipitation on the transformation characteristics of Ni-rich NiTi shape memory alloys during thermal cycling

“…In engineering applications, the martensitic forward and reverse transformations must be repeatable for many cycles [17,18]. While it is in theory fully reversible [19], the phase transformation involves nucleation and growth of martensite into the adjacent, austenitic material.…”

Relationship between microstructure, cytotoxicity and corrosion properties of a Cu–Al–Ni shape memory alloy

“…However, Cu-Al-Ni alloys have some considerable advantages over Ni-Ti: less difficult melting, casting and composition control, higher Young's modulus, better machinability, better work/cost ratio [4,[8][9][10] and, perhaps most importantly, the stability of the two-way shape memory is better [11]. Furthermore, additional advantages can be gained through rapid solidification, such as better stability of mechanical properties at elevated temperatures, lower coarsening rates during heat treatment, considerable ageing resistance [9] and improved electrical and magnetic properties [9,12].…”

Training and two-way shape memory in NiTi alloys: influence on thermal parameters

“…A lot of theoretical modelling has been carried out to analyse the thermomechanical effect using suitable constitutive equations [5][6][7], which are introduced in finite element simulations. From an experimental point of view, several groups have considered the efficiency of different training methods such as shape memory, pseudoelastic, thermal cycling under a constant stress or martensite over-deformation training, in order to obtain the maximum two-way memory strain with respect to training strain [8][9][10][11].…”