Calorimetric techniques for the evaluation of thermal efficiencies of shape memory alloys

Jardine, A. P.

doi:10.1007/bf01174530

Cited by 19 publications

(9 citation statements)

References 22 publications

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“…[1][2][3][4][5][6][7][8][9]26,[28][29][30][31][32][33] The reported experimental data differ significantly from each other. It often happens that the same composition alloys have quite different M s temperatures and enthalpy values.…”

Section: Experimental Information and Parameter Evaluationmentioning

confidence: 53%

Thermodynamic study of the low-temperature phase B19′ and the martensitic transformation in near-equiatomic Ti-Ni shape memory alloys

Tang

1997

Metall Mater Trans A

176

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Experimental information on the transformation temperatures and the thermodynamic properties of the near-equiatomic TiNi alloys is analyzed. Special attention is paid to the estimation of T 0 temperature from experimental M s and A f temperatures. The properties of the TiNi low-temperature phase (B19') are evaluated from selected experimental data by using a two-sublattice model. The Ti-Ni phase diagram including the B19' phase is then calculated. It reveals that the equiatomic TiNi parent phase (B2) remains stable from high temperatures until 370 K, and then the B19' phase becomes thermodynamically stable as a linear compound under 370 K. Thermodynamic quantities such as the T 0 temperature and transformation enthalpy are also calculated and compared with experimental data. Further, the M s temperature is predicted and compared with data from different sources.

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Section: Experimental Information and Parameter Evaluationmentioning

confidence: 53%

Thermodynamic study of the low-temperature phase B19′ and the martensitic transformation in near-equiatomic Ti-Ni shape memory alloys

Tang

1997

Metall Mater Trans A

176

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“…Since the enthalpies of formation are excellent indicators of the stability of alloys, we believe that understanding the thermochemical behavior of such compounds would be helpful to members of the scientific community who design new shape memory alloys with specific applications in mind [17,18]. We found the list of compounds where shape memory effect has been observed very helpful in identifying the more important shape memory alloys [13,19].…”

Section: Introductionmentioning

confidence: 97%

The thermochemical behavior of some binary shape memory alloys by high temperature direct synthesis calorimetry

Meschel

Pavlů

Nash

2011

Journal of Alloys and Compounds

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“…The transformation temperatures of the strip were obtained by DSC tests after annealing. This kind of SMA alloy has around 70 °C active A f temperature and shows high-energy efficiency compared to other types of SMA alloys [16]. For the first actuator, one strip was utilized as the SMA element of the actuator.…”

Section: Sma Actuatormentioning

confidence: 99%

“…Lagoudas and Bhattcharyya [15] evaluated the efficiency of the thermoelectric SMA actuators. Jardine [16] and Gil [17] proposed the calorimetric techniques and mechanical tests to evaluate the efficiency of shape memory alloys based on ideal shape memory effect (SME) heat engine cycle [18].…”

Section: Efficiencymentioning

confidence: 99%

See 1 more Smart Citation

<title>Fuel-powered compact SMA actuator</title>

Rediniotis

Lagoudas

Jun

et al. 2002

Smart Structures and Materials 2002: Industrial and Commercial Applications of Smart Structures Technologies

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This work discusses the numerical analysis, the design and experimental test of the fuel-powered compact SMA actuator along with its capabilities and limitations. Convection heating and cooling using water actuate the SMA element of the actuator. The energy of fuels, having a high energy density, is used as the energy source for the SMA actuator in order to increase power and energy density of the system, and thus in order to obviate the need for electrical power supplies such as batteries. The system is composed of pump, valves, bellows, heater (burner), control unit and a displacement amplification device. The experimental test of the first designed SMA actuator system results in 150 M Pa stress (force: 1560N) with 3 % strain and 0.5 Hz actuation frequency. The actuation frequency is compared with the prediction obtained from numerical analysis. For the first designed fuel-powered SMA actuator system, the results of numerical analysis were utilized in determining design parameters and operating conditions.

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Calorimetric techniques for the evaluation of thermal efficiencies of shape memory alloys

Cited by 19 publications

References 22 publications

Thermodynamic study of the low-temperature phase B19′ and the martensitic transformation in near-equiatomic Ti-Ni shape memory alloys

Thermodynamic study of the low-temperature phase B19′ and the martensitic transformation in near-equiatomic Ti-Ni shape memory alloys

The thermochemical behavior of some binary shape memory alloys by high temperature direct synthesis calorimetry

<title>Fuel-powered compact SMA actuator</title>

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