Synthesis and characterization of Fe-Mn-Si shape memory alloy by mechanical alloying and subsequent sintering

Takeshi Saito, Cz Kapusta, Akito Takasaki

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

An Fe-Mn-Si bulk alloy was produced from elemental powders by mechanical alloying (MA) and subsequent sintering. The shape memory effect, microstructure and mechanical property of the bulk alloy were investigated. The α phase transformed into the γ phase during MA. The MA played an essential role in stabilizing the γ phase, which is associated with the shape memory effect in this alloy system. The γ phase with small amounts of ε and α' martensitic phases formed after subsequent sintering. After deformation, a γ→ε stress-induced martensitic phase transformation occurred. Shape recovery was observed after subsequent heating, associated with an ε→γ reverse martensitic transformation. The grain size of the bulk alloy was about 2-3. μm, and the yield strength was about 500. MPa. These results show that powder metallurgy, a combination of MA and subsequent sintering, has the potential to produce Fe-Mn-Si shape memory alloy.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalMaterials Science and Engineering A
Volume592
DOIs
Publication statusPublished - 2014 Jan 13

Fingerprint

Mechanical alloying
shape memory alloys
Shape memory effect
alloying
sintering
Sintering
synthesis
powder metallurgy
Martensitic transformations
martensitic transformation
Powder metallurgy
yield strength
Powders
phase transformations
Yield stress
grain size
Phase transitions
recovery
mechanical properties
Heating

Keywords

  • Martensitic transformations
  • Mechanical alloying
  • Mechanical characterization
  • Powder metallurgy
  • Shape memory alloy
  • X-ray diffraction

ASJC Scopus subject areas

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

Cite this

Synthesis and characterization of Fe-Mn-Si shape memory alloy by mechanical alloying and subsequent sintering. / Saito, Takeshi; Kapusta, Cz; Takasaki, Akito.

In: Materials Science and Engineering A, Vol. 592, 13.01.2014, p. 88-94.

Research output: Contribution to journalArticle

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N2 - An Fe-Mn-Si bulk alloy was produced from elemental powders by mechanical alloying (MA) and subsequent sintering. The shape memory effect, microstructure and mechanical property of the bulk alloy were investigated. The α phase transformed into the γ phase during MA. The MA played an essential role in stabilizing the γ phase, which is associated with the shape memory effect in this alloy system. The γ phase with small amounts of ε and α' martensitic phases formed after subsequent sintering. After deformation, a γ→ε stress-induced martensitic phase transformation occurred. Shape recovery was observed after subsequent heating, associated with an ε→γ reverse martensitic transformation. The grain size of the bulk alloy was about 2-3. μm, and the yield strength was about 500. MPa. These results show that powder metallurgy, a combination of MA and subsequent sintering, has the potential to produce Fe-Mn-Si shape memory alloy.

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