Mechanical properties of Ti-50(Pt,Ir) high-temperature shape memory alloys

Yoke Yamabe-Mitarai, Toru Hara, Seiji Miura, Hideki Hosoda

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

To develop high-temperature shape memory alloys, Ti-50(Pt,Ir)mol% compounds are noted because of their martensitic transformation from B2 to B19(2H) or 4H(4O) structures above 1273K. A thermal expansion measurement and loading-unloading compression test were performed for Ti-50(Pt,Ir) to determine if the shape memory effect or superelasticity was shown. The thermal expansion measurement indicated the shape recovery in some of the compounds. The maximum shape recovery was about 4% by reheating at the above martensite transformation temperature after a loading-unloading compression test. Superelasticity was also observed in ternary compounds. The potential of Ti-50(Pt,Ir) as a high-temperature shape memory alloy is discussed.

Original languageEnglish
Pages (from-to)650-657
Number of pages8
JournalMaterials Transactions
Volume47
Issue number3
DOIs
Publication statusPublished - 2006 Mar 1
Externally publishedYes

Keywords

  • B19
  • B2
  • High-temperature shape memory alloys
  • Martensitic transformation
  • TiIr
  • TiPt

ASJC Scopus subject areas

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

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