Characterization of the shape memory properties of a Ni 45.3Ti39.7Hf10Pd5 alloy

E. Acar, H. E. Karaca, H. Tobe, R. D. Noebe, Y. I. Chumlyakov

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The load-biased shape memory and superelastic responses of a Ni 45.3Ti39.7Hf10Pd5 polycrystalline alloy were investigated in compression. Transformation strain of up to 4.6% and work output of up to 29 J cm-3 were determined from load-biased thermal cycling experiments. The alloy showed good superelastic behavior at 90 oC with recoverable strain of over 4%. It was also determined that the Ni 45.3Ti39.7Hf10Pd5 alloy could develop two-way shape memory strain of 1.6% without an intense training process. Transmission electron microscopy (TEM) revealed that the internal twins formed in the martensite variants were h011i type II twins.

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalJournal of Alloys and Compounds
Volume578
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This work was supported by the NASA Fundamental Aeronautics Program, Aeronautical Sciences Project and the NASA EPSCOR program under Grant No.: NNX11AQ31A , KY EPSCoR RID program under Grant No.: 3049024332 and RFBR project with Grant No.: 10-03-0154-a .

Keywords

  • High strength SMAs
  • High work output
  • Microstructure
  • NiTiHfPd alloys
  • Shape memory alloys
  • TWSME

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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