Stress-strain-temperature behaviour of [001] single crystals of Co 49Ni21Ga30 ferromagnetic shape memory alloy under compression

J. Dadda, D. Canadinc, H. J. Maier, I. Karaman, H. E. Karaca, Y. I. Chumlyakov

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26 Scopus citations


The conventional shape memory effect (SME) and pseudoelasticity (PE) in as-grown [100] single crystals of Co49Ni21Ga30 alloy under compression are reported. The parent single crystals exhibit about 5% transformation strain at compressive stress levels as low as 4 MPa, and a pseudoelastic strain of 4.5%. Complete PE was observed in the temperature range from 35 to 285C, along with increasing stress hysteresis with temperature. The latter is attributed to increasing number of variants and the corresponding variant-variant interactions. We demonstrate that the current material can be utilized in applications that demand high strength at elevated temperatures. Moreover, the current results also indicate the potential of this material to exhibit magnetic shape memory effect, which could broaden the scope of utility of this material upon further research.

Original languageEnglish
Pages (from-to)2313-2322
Number of pages10
JournalPhilosophical Magazine
Issue number16
StatePublished - 2007

Bibliographical note

Funding Information:
The work presented in this paper was funded by Deutsche Forschungsgemeinschaft, US Army Research Office, Contract No DAAD 19-02-1-0261, US National Science Foundation – Division of Materials Research, Contract No 0244126, and the US Civilian Research and Development Foundation, Grant No RE1-2525-TO-03. The Russian part of the work was supported by RFFI grants 05-08-17915a and 06-08-08011.

ASJC Scopus subject areas

  • Condensed Matter Physics


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