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A thermodynamic calculation method on the temperature hysteresis of thermoelastic martensite transformation in Ni Ti shape memory alloys was developed. The thermodynamic analysis indicates that the irreversible consumed energy and the elastic energy are the important factors influencing transformation hysteresis. It is revealed that the wide inherent transformation hysteresis can be attributed to the higher irreversible consumed energy of martensite transformation in Ni Ti Nb based alloys than those of Ni Ti binary alloys.
A thermodynamic calculation method on the temperature hysteresis of thermoelastic martensite transformation in Ni Ti shape memory alloys was developed. The thermodynamic analysis that that irreversible consumed energy and the elastic energy are the important factors influencing transformation hysteresis. It is revealed that the high inherent transformation hysteresis can be attributed to the higher irreversible consumed energy of martensite transformation in Ni Ti Nb based alloys than those of Ni Ti binary alloys.