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

27 Citations (Scopus)


We have investigated the shape memory effect and ductility of Fe-30Mn-(6-x)Si-xAl (x = 0, 1, 2 and 3; in mass-%) alloys. The alloy with x = 0 shows a good shape memory effect but suffers from poor ductility, while the alloys with x = 2 and 3 are well-known TWIP (twinning induced plasticity) steels that show high ductility. In the present study, it was found that the shape memory effect is observed in the samples with x = 0 and 1, but disappears when x exceeds 2. On the other hand, the ductility almost linearly increases with increasing the amount of Al. A good combination of the shape memory effect and ductility was achieved in the alloy with x = 1.

Original languageEnglish
Pages (from-to)2729-2734
Number of pages6
JournalMaterials Transactions
Issue number10
Publication statusPublished - 2007 Oct



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

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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