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

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Abstract

The latent heat and entropy changes of NiTi shape memory effect (SME) alloys have been evaluated by three different calorimetric techniques; adiabatic calorimetry, differential scanning calorimetry and a Clapeyron analysis of isothermal stress-strain data. It is found that these techniques provide consistent estimates for the enthalpy and entropy to within 20% for NiTi and noble metal SME alloys. From published thermodynamic data for SME alloys, thermal efficiencies were calculated based on an ideal SME heat engine cycle. It was found that NiTi provides the maximum thermal efficiency with the highest temperature transformation range.

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Author notes

  1. A. P. Jardine

    Present address: Department of Material Science and Engineering, Cornell University, 14853, Ithaca, New York, USA

Authors and Affiliations

  1. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, BS8 1TL, Bristol, UK

    A. P. Jardine

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  1. A. P. Jardine
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Jardine, A.P. Calorimetric techniques for the evaluation of thermal efficiencies of shape memory alloys. J Mater Sci 24, 2587–2593 (1989). https://doi.org/10.1007/BF01174530

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  • DOI: https://doi.org/10.1007/BF01174530

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