Compressive response of Ni45.3Ti34.7Hf15Pd5 and Ni45.3Ti29.7Hf20Pd5 shape-memory alloys

E. Acar, H. Tobe, I. Kaya, H. E. Karaca, Y. I. Chumlyakov

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The shape-memory properties of Ni45.3Ti34.7Hf15Pd5 and Ni45.3Ti29.7Hf20Pd5 polycrystalline alloys were determined through superelasticity and shape-memory tests in compression. It has been revealed that the Ni45.3Ti34.7Hf15Pd5 has a maximum transformation strain of 3.8 % and work output of up to 30 J cm−3, while the Ni45.3Ti29.7Hf20Pd5 has a maximum transformation strain of 2.6 % and work output of up to 20 J cm−3 at 700 MPa. Two-way shape-memory strains of 0.6 and 0.85 % were obtained in Ni45.3Ti34.7Hf15Pd5 and Ni45.3Ti29.7Hf20Pd5 alloys, respectively. The Ni45.3Ti34.7Hf15Pd5 showed superelasticity at 90 °C with recoverable strain of 3.1 %, while high hardening of Ni45.3Ti29.7Hf20Pd5 limited its superelastic behavior. Microstructure of the Ni45.3Ti34.7Hf15Pd5 alloy was revealed by transmission electron microscopy, and effects of composition on the lattice parameters of the transforming phases and martensite morphology were discussed.

Original languageEnglish
Pages (from-to)1924-1934
Number of pages11
JournalJournal of Materials Science
Volume50
Issue number4
DOIs
StatePublished - Feb 2015

Bibliographical note

Publisher Copyright:
© 2014, Springer Science+Business Media New York.

Funding

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

FundersFunder number
National Aeronautics and Space AdministrationNNX11AQ31A, 3049024332
Russian Foundation for Basic Research10-03-0154-a

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Ceramics and Composites
    • Mechanical Engineering
    • Polymers and Plastics
    • General Materials Science
    • Materials Science (miscellaneous)

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