Influence of Al on shape memory effect and twinning induced plasticity of Fe-Mn-Si-Al system alloy

Motomichi Koyama, Masato Murakami, Kazuyuki Ogawa, Takehiko Kikuchi, Takahiro Sawaguchi

Research output: Contribution to journalArticle

3 Citations (Scopus)


We investigated the shape memory effect and ductility of Fe-30Mn-(6-x) Si-xAl (x = 0, 1, 2 and 3, mass-%) alloys. The alloy for x = 0 is known as a shape memory alloy, which shows a good shape memory effect but poor ductility. The alloys for x = 2 and 3 are known as TWIP (Twinning Induced Plasticity) steels, which show a high ductility but the shape memory effect has not been reported in these alloys. In the present study, it was found that the shape memory effect is preserved for x = 0 and 1, but drastically disappears when x exceeds 2. On the other hand, the ductility almost linearly increases with increasing amount of Al. As a consequence, the best combination of the shape memory effect and ductility was found in the alloy for x = 1.

Original languageEnglish
Pages (from-to)502-507
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number6
Publication statusPublished - 2007 Jun 1



  • Ductility
  • Iron-manganese- silicon-aluminum
  • Martensitic transformation
  • Shape memory alloy
  • Twinning
  • Twinning induced plasticity steel

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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