Superelastic effect in polycrystalline ferrous alloys

T. Omori, K. Ando, M. Okano, X. Xu, Y. Tanaka, I. Ohnuma, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

230 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)68-71
Number of pages4
JournalScience
Volume333
Issue number6038
DOIs
Publication statusPublished - 2011 Jul 1

ASJC Scopus subject areas

  • General

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