The electrical resistivity (ER) of Flexinol nickel-titanium shape memory alloys (SMA) has been measured in the range from -15 to 105 degrees C. The investigated Flexinol wires have two diameters, 150 and 375 mu m. The experimental results show new temperatures of phase transformation (TTR) evidencing the unexpected presence of the R-phase. The transformations from austenite to martensite, from austenite to R-phase, and vice versa are simultaneous. In the range [20 to 110 degrees C] the hysteresis is almost negligible, whereas in the range [-15 to 105 degrees C] the accommodation process of the hysteresis is observed.

Gori, F., Carnevale, D., Doro Altan, A.M., Nicosia, S., & Pennestrì, E. (2006). A new hysteretic behavior in the electrical resistivity of flexinol shape memory alloys versus temperature. INTERNATIONAL JOURNAL OF THERMOPHYSICS, 27(3), 866-879 [10.1007/s10765-006-0060-3].

A new hysteretic behavior in the electrical resistivity of flexinol shape memory alloys versus temperature

GORI, FABIO;CARNEVALE, DANIELE;DORO ALTAN, ANNA MARIA;NICOSIA, SALVATORE;PENNESTRI', ETTORE
2006

Abstract

The electrical resistivity (ER) of Flexinol nickel-titanium shape memory alloys (SMA) has been measured in the range from -15 to 105 degrees C. The investigated Flexinol wires have two diameters, 150 and 375 mu m. The experimental results show new temperatures of phase transformation (TTR) evidencing the unexpected presence of the R-phase. The transformations from austenite to martensite, from austenite to R-phase, and vice versa are simultaneous. In the range [20 to 110 degrees C] the hysteresis is almost negligible, whereas in the range [-15 to 105 degrees C] the accommodation process of the hysteresis is observed.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore ING-IND/10 - Fisica Tecnica Industriale
English
Con Impact Factor ISI
electrical resistivity; Flexinol; hysteresis; phase transformation; shape memory alloy (SMA); temperature
Gori, F., Carnevale, D., Doro Altan, A.M., Nicosia, S., & Pennestrì, E. (2006). A new hysteretic behavior in the electrical resistivity of flexinol shape memory alloys versus temperature. INTERNATIONAL JOURNAL OF THERMOPHYSICS, 27(3), 866-879 [10.1007/s10765-006-0060-3].
Gori, F; Carnevale, D; DORO ALTAN, Am; Nicosia, S; Pennestri', E
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/50416
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