Abstract
It can be considered that much energy is necessary to recover large strain by shape memory effect and superelasticity. Martensitic transformation is important factor of these effects, and possible process for storing energy. In this study, potential energy change of the atoms near the habit plane has been calculated for martensitic transformation in Ti-Ni equiatomic alloy by Modified Analytic Embedded Atom Method (MAEAM). Phase transformation is modelled by crystallography of martensitic transformation by Wechsler, Lieberman and Read (WLR theory). Furthermore, potential energy change has been calculated for slip deformation in B2 structure to compare with result for martensitic transformation. These results showed that B19' martensite phase was unstable than B2 austenite, but this transformation is the easiest process than other deformation systems. This means that martensitic transformation and stress induced transformation in Ti-Ni alloy are reversible deformation without plastic deformation.
