Atomic force microscopic observation of microstructural changes in Fe-Mn-Si-Al shape memory alloy

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The surface relief caused by stress-induced fcc/hcp martensitic transformation in an Fe-30Mn-5Si-1Al shape memory alloy, which exhibited a good shape memory effect and an improved ductility due to a small addition of aluminum to a conventional Fe-30Mn-6Si shape memory alloy, was quantitatively analyzed by atomic force microscopy. The orientation of an austenite grain was determined with surface traces of four {111} f planes, which made it possible to determine the surface tilt angles for all 12 variants of hep martensite and deformation twins. On the basis of these values, the stress-induced martensite and deformation twin, coexisting in a grain, were identified by investigating the surface tilt angles. The surface relief caused by the stress-induced martensite recovered after heating above the reverse transformation temperature, but that due to the deformation twin remained unaltered.

Original languageEnglish
Pages (from-to)672-677
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume71
Issue number9
DOIs
Publication statusPublished - Sep 1 2007

Fingerprint

shape memory alloys
Shape memory effect
martensite
Martensite
Martensitic transformations
martensitic transformation
austenite
Aluminum
ductility
Austenite
Ductility
Atomic force microscopy
atomic force microscopy
aluminum
Heating
heating
Temperature
temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Atomic force microscopic observation of microstructural changes in Fe-Mn-Si-Al shape memory alloy. / Koyama, Motomichi; Murakami, Masato; Ogawa, Kazuyuki; Kikuchi, Takehiko; Sawaguchi, Takahiro.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 71, No. 9, 01.09.2007, p. 672-677.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Murakami, Masato ; Ogawa, Kazuyuki ; Kikuchi, Takehiko ; Sawaguchi, Takahiro. / Atomic force microscopic observation of microstructural changes in Fe-Mn-Si-Al shape memory alloy. In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2007 ; Vol. 71, No. 9. pp. 672-677.
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