Continuous transition of deformation modes in Fe-30Mn-5Si-1Al alloy

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Deformation modes at various stages of plastic deformation have been investigated at the same location in an Fe-30Mn-5Si-1Al (mass%) alloy specimen, which exhibits a good shape memory effect associated with the FCC(γ) → HCP(ε) martensitic transformation and a relatively high ductility caused by deformation twinning. The surface relief caused by the γ → ε martensitic transformation, deformation twinning and slip band formation has been analyzed by measuring the surface tilt angles corresponding to each deformation mode by atomic force microscopy. Although the ε-martensitic transformation is the dominant deformation mode at an early deformation stage, a part of the ε- martensite plates changes to deformation twins with increasing tensile strain. Slip deformation also occurs inside the same region under excessive strain. A continuous transition of these deformation modes occurs in other grains as well in the same order: ε martensite → deformation twins → slip bands.

Original languageEnglish
Pages (from-to)1194-1199
Number of pages6
JournalMaterials Transactions
Volume51
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Fingerprint

Martensitic transformations
martensitic transformation
Twinning
edge dislocations
twinning
martensite
Martensite
Tensile strain
ductility
Shape memory effect
plastic deformation
Ductility
Atomic force microscopy
Plastic deformation
slip
atomic force microscopy

Keywords

  • Atomic force microscope
  • Shape memory
  • Slip deformation
  • Stress induced martensitic transfonnation
  • Twinning deformation
  • Twinning induced plasticity

ASJC Scopus subject areas

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

Cite this

Continuous transition of deformation modes in Fe-30Mn-5Si-1Al alloy. / Koyama, Motomichi; Sawaguchi, Takahiro; Ogawa, Kazuyuki; Kikuchi, Takehiko; Murakami, Masato.

In: Materials Transactions, Vol. 51, No. 7, 07.2010, p. 1194-1199.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Sawaguchi, Takahiro ; Ogawa, Kazuyuki ; Kikuchi, Takehiko ; Murakami, Masato. / Continuous transition of deformation modes in Fe-30Mn-5Si-1Al alloy. In: Materials Transactions. 2010 ; Vol. 51, No. 7. pp. 1194-1199.
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