Thermally and stress-induced martensitic transformation in Co-Ni-Al ferromagnetic shape memory alloy single crystals

D. Meyer, H. J. Maier, J. Dadda, I. Karaman, H. E. Karaca

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

In the present study, the shape memory characteristics of Co38Ni33Al29 (numbers indicate at.%) alloy single crystals are investigated. Transformation behavior under constant stress levels, two-way shape memory behavior, the effect of cyclic deformation and pseudoelasticity as a function of strain and temperature were studied. The single crystals demonstrate large two-way shape memory strain, a near perfect pseudoelastic behavior with up to 4% pseudoelastic strain, low pseudoelastic stress hysteresis, a large pseudoelastic temperature window and high resistance for dislocation slip.

Original languageEnglish
Pages (from-to)875-878
Number of pages4
JournalMaterials Science and Engineering: A
Volume438-440
Issue numberSPEC. ISS.
DOIs
StatePublished - Nov 25 2006

Bibliographical note

Funding Information:
This work was supported by Deutsche Forschungsgemeinschaft, Army Research Office, Contract No. DAAD 19-02-1-0261, and National Science Foundation, Division of Materials Research, Contract No. 0244126.

Keywords

  • CoNiAl
  • Martensitic phase transformation
  • Pseudoelasticity
  • Shape memory

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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