Shape memory characteristics of Fe-30Mn-5Si-1Al and Fe28Mn-5Si-1 AI-5Cr alloys

M. Koyama, Masato Murakami, K. Ogawa, T. Kikuchi, S. Sawaguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have recently reported that the ductility of Fe-Mn-Si shape memory alloys can be greatly improved by replacing a part of Si with a small amount of Al without decaying the shape memory effect. Enhancement of the ductility is ascribed to the introduction of deformation twins in addition to stress-induced hep martensite on loading. In this work, the shape recovery strains and recovery temperatures were measured for Fe-30Mn-5Si-1A1 alloy and corrosion-resistant Fe-28Mn-5Si-1A1-5Cr alloy. The maximum shape recovery strain of Al-added alloys exceeded 2%, which was comparable to those of the alloys without Al addition. The initial tensile strain required for obtaining the maximum shape recovery strain was about 8% in Al-added alloys, which was about twice larger than that of non-Al alloys, probably due to the intrusion of deformation twins. It was also found that the shape recovery finishing temperature was as low as 470K.

Original languageEnglish
Title of host publicationSMST-2007 - Proceedings of the International Conference on Shape Memory and Superelastic Technologies
Pages653-658
Number of pages6
DOIs
Publication statusPublished - 2008
EventInternational Conference on Shape Memory and Superelastic Technologies, SMST-2007 - Tsukuba
Duration: 2007 Dec 22007 Dec 5

Other

OtherInternational Conference on Shape Memory and Superelastic Technologies, SMST-2007
CityTsukuba
Period07/12/207/12/5

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ASJC Scopus subject areas

  • Mechanics of Materials

Cite this

Koyama, M., Murakami, M., Ogawa, K., Kikuchi, T., & Sawaguchi, S. (2008). Shape memory characteristics of Fe-30Mn-5Si-1Al and Fe28Mn-5Si-1 AI-5Cr alloys. In SMST-2007 - Proceedings of the International Conference on Shape Memory and Superelastic Technologies (pp. 653-658) https://doi.org/10.1361/cp2007smst653