Stress–strain–temperature behaviour of [001] single crystals of Co49Ni21Ga30 ferromagnetic shape memory alloy under compression Academic Article uri icon

abstract

  • 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.

author list (cited authors)

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

citation count

  • 22

publication date

  • June 2007