title: Superelastic effect in polycrystalline ferrous alloys.
abstract: In superelastic alloys, large deformation can revert to a memorized shape after removing the stress. However, the stress increases with increasing temperature, which limits the practical use over a wide temperature range. Polycrystalline Fe-Mn-Al-Ni shape memory alloys show a small temperature dependence of the superelastic stress because of a small transformation entropy change brought about by a magnetic contribution to the Gibbs energies. For one alloy composition, the superelastic stress varies by 0.53 megapascal/°C over a temperature range from -196 to 240°C.
authors: Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6-02 Aoba-yama, Sendai 980-8579, Japan. omori@material.tohoku.ac.jp
authors: T
authors: T
authors: Omori
authors: K
authors: K
authors: Ando
authors: M
authors: M
authors: Okano
authors: X
authors: X
authors: Xu
authors: Y
authors: Y
authors: Tanaka
authors: I
authors: I
authors: Ohnuma
authors: R
authors: R
authors: Kainuma
authors: K
authors: K
authors: Ishida