The effects of thermomechanical training treatment on the deformation characteristics of Fe-Mn-Si-Al alloys

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

Research output: Contribution to journalArticle

38 Citations (Scopus)


We have studied the effects of the thermomechanical training treatment on the deformation mode for Fe-30Mn-(6 - x)Si-xAl (x = 0, 1, 2 and 3 mass%) alloys, which exhibit complicated deformation processes due to coexistence of the stress-induced fcc to hcp martensitic transformation and the mechanical twinning of the fcc matrix in addition to slip deformation. The stress-strain curves at each training cycle were analyzed for the alloys, and the deformation microstructures were observed with atomic force microscopy on a Fe-30Mn-5Si-1Al alloy before and after the training treatment. It was found that the deformation mode shifts from the mechanical twinning to the stress-induced martensitic transformation, as the training proceeds.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalMaterials Science and Engineering A
Issue number1-2
Publication statusPublished - 2008 Dec 15



  • Deformation twin
  • Fe-Mn-Si
  • Martensitic transformation
  • Shape memory effect
  • Training
  • Twinning-induced plasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this