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Thermodynamics of Nitinol
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27.the wire state equation coefficients were obtained by fitting the state equations of Sec. III of the present paper to 30 mil Nitinol wire data published in Ref. 24.
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42.Note that is the amount of heat absorbed for a constant force temperature‐change, dT, and, by assumption, no change in phase (i.e., no change in Z). Actually, the (sensible) heat subtracted by the experimentalists29–37 is that obtained by connecting at to at with a straight line on the vs T data plot, and integrating the energy below the line from To
43.For the wire samples, conditioning reduced the isothermal strain between phases to (Ref. 24). However, the helix torsional data indicated a conditioned value closer to 6% (Ref. 22).
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45.D. M. Goldstein (private communication). Plans have been made to perform constant force specific heat measurements on samples of the Nitinol helix (Table I) at the Naval Surface Weapons Center, Silver Springs, MD.
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