Tension - Compression Asymmetry in Co49Ni21Ga30 High-Temperature Shape Memory Alloy Single Crystals Conference Paper uri icon

abstract

  • This paper reports on the tension-compression asymmetry of [001]-oriented Co49Ni21Ga30 single crystals at elevated temperatures. Maximum strains of -4.8 % and 8.6 % in compression and tension, respectively, were found. A linear Clausius-Clapeyron relationship was observed for both stress-states where the smaller slope in tension resulted in a significant increase of the phase transformation temperatures with stress, which reached 180 °C under a constant stress level of 150 MPa. In addition, the material demonstrated a large pseudoelastic temperature range of about 300 °C under both stress state conditions. The results in this study unequivocally indicate the potential of these alloys for applications where elevated temperatures and stress levels prevail. © (2013) Trans Tech Publications, Switzerland.

author list (cited authors)

  • Niendorf, T., Dadda, J., Lackmann, J., Monroe, J. A., Karaman, I., Panchenko, E., Karaca, H. E., & Maier, H. J.

citation count

  • 9

publication date

  • January 2013