Authors:
R. Artiaga University of A Coruña Department of Industrial Engineering II, E.P.S. Ferrol Spain Ferrol Spain

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A. Garcia University of A Coruña Department of Industrial Engineering II, E.P.S. Ferrol Spain Ferrol Spain

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L. Garcia University of A Coruña Department of Industrial Engineering II, E.P.S. Ferrol Spain Ferrol Spain

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A. Varela University of A Coruña Department of Industrial Engineering II, E.P.S. Ferrol Spain Ferrol Spain

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J. Mier University of A Coruña Department of Industrial Engineering II, E.P.S. Ferrol Spain Ferrol Spain

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S. Naya University of A Coruña Department of Mathematics, Faculty of Computer Sciences 15004 A Coruña Spain 15004 A Coruña Spain

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M. Grana University of A Coruña Department of Industrial Engineering, E.U.P. Ferrol Spain Ferrol Spain

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Abstract  

The nickel-titanium alloys are usually known as Shape Memory alloys because of their ability to return to some previously defined shape or size when subjected to the appropriate thermal procedure. Mechanical properties of a nickel titanium wire were investigated by DMTA using cylindrical tension mode. The Young"s modulus, the maximum strain and residual deformation have been calculated. Recovery of previously deformed samples was observed in constant stress temperature ramp tests. Relaxation stress behaviour at temperatures above the austenitic transformation has been studied. The strain and frequency ranges of linear response have been determined by dynamic experiments. Strain amplitude of 0.1% and frequency of 1 Hz have been chosen for the temperature ramp dynamic experiments. A big change between 65 and 95C is observed in the storage modulus. The values of E' at temperatures below and above the transition are essentially constant. Finally, the effects of the frequency at different temperatures have been examined.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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