Compressive response of a single crystalline CoNiAl shape memory alloy

H. E. Karaca, I. Karaman, Y. I. Chumlyakov, D. C. Lagoudas, X. Zhang

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

The effects of crystallographic orientation and temperature on pseudoelasticity and recoverable strain levels under constant stress are revealed for the Co-31at.%Ni-27at.%Al alloy single crystals under compression. The single crystals demonstrate a perfect pseudoelasticity at temperatures as high as 170 °C, recoverable transformation strains of 4% along the [100] orientation and 2.5% along the [123] orientation, small stress hysteresis (<40 MPa) and high strength level against dislocation formation.

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalScripta Materialia
Volume51
Issue number3
DOIs
StatePublished - Aug 2004

Bibliographical note

Funding Information:
This work was supported by Army Research Office, contract no. DAAD 19-02-1-0261, NSF––Division of Materials Research, contract no. 0244126, and The US Civilian Research and Development Foundation, grant no. RE1-2525-TO-03.

Keywords

  • CoNiAl
  • Martensitic phase transformation
  • Pseudoelasticity
  • Shape memory alloys

ASJC Scopus subject areas

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

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