Si content dependence on shape memory and tensile properties in Fe-Mn-Si-C alloys

Motomichi Koyama, T. Sawaguchi, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Fe-17Mn-xSi-0.3C alloys (x= 0, 2, 4, 6. mass%) were used to investigate the influence of Si on the tensile properties and the shape recovery strain. We considered three kinds of tensile properties: critical stress for e{open}-martensitic transformation, critical stress for dislocation gliding, and work hardening rate. A significant increase in the shape recovery strain was obtained in the 6%Si added alloy, when the alloys were heated to 873. K after a pre-straining of 8% in tension. The critical stresses for both the e{open}-martensitic transformation and the dislocation gliding increased with an increase in Si content from 0 to 4% but were similar in the 4%Si and 6%Si added alloys. However, the work hardening rate between the 4%Si and 6%Si added alloys was significantly different and was much smaller in the 6%Si added alloy. Hence, a 6%Si addition suppresses the plastic deformation due to the dislocation gliding through the decrease in the work hardening rate along with the solution hardening. As a result, e{open}-martensitic transformation occurs as the predominant deformation mode at smaller strains and improves the shape recovery strain.

Original languageEnglish
Pages (from-to)2882-2888
Number of pages7
JournalMaterials Science and Engineering A
Volume528
Issue number6
DOIs
Publication statusPublished - Mar 15 2011
Externally publishedYes

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tensile properties
Shape memory effect
Tensile properties
gliding
work hardening
critical loading
Martensitic transformations
martensitic transformation
Strain hardening
recovery
Recovery
hardening
plastic deformation
Hardening
Plastic deformation

All Science Journal Classification (ASJC) codes

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

Cite this

Si content dependence on shape memory and tensile properties in Fe-Mn-Si-C alloys. / Koyama, Motomichi; Sawaguchi, T.; Tsuzaki, Kaneaki.

In: Materials Science and Engineering A, Vol. 528, No. 6, 15.03.2011, p. 2882-2888.

Research output: Contribution to journalArticle

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