The aim of the present paper is to examine both the fatigue behaviour and the phase transition mechanisms of an equiatomic pseudo-elastic NiTi Shape Memory Alloy through cyclic tests (up to 100 loading cycles). More precisely, miniaturised dog-bone specimens are tested by using a customised testing machine and the contents of both austenite and martensite phase are experimentally measured by means of X-Ray diffraction (XRD) analyses. On the basis of such experimental results in terms of martensite content, an analytical model is here formulated to correlate the stress-strain relationship to the phase transition mechanisms. Finally, a validation of the present model by means of experimental data pertaining the stress-strain relationship is performed.

MECHANICAL BEHAVIOUR AND PHASE TRANSITION MECHANISMS OF A SHAPE MEMORY ALLOY BY MEANS OF A NOVEL ANALYTICAL MODEL / Carpinteri, Andrea; DI COCCO, Vittorio; Fortese, Giovanni; Iacoviello, Francesco; Natali, Stefano; Ronchei, Camilla; Scorza, Daniela; Vantadori, Sabrina; Zanichelli, Andrea. - In: ACTA MECHANICA ET AUTOMATICA. - ISSN 1898-4088. - 12:2(2018), pp. 105-108. [10.2478/ama-2018-0017]

MECHANICAL BEHAVIOUR AND PHASE TRANSITION MECHANISMS OF A SHAPE MEMORY ALLOY BY MEANS OF A NOVEL ANALYTICAL MODEL

Andrea CARPINTERI;Giovanni FORTESE;Camilla RONCHEI;Daniela SCORZA;Sabrina VANTADORI;Andrea ZANICHELLI
2018

Abstract

The aim of the present paper is to examine both the fatigue behaviour and the phase transition mechanisms of an equiatomic pseudo-elastic NiTi Shape Memory Alloy through cyclic tests (up to 100 loading cycles). More precisely, miniaturised dog-bone specimens are tested by using a customised testing machine and the contents of both austenite and martensite phase are experimentally measured by means of X-Ray diffraction (XRD) analyses. On the basis of such experimental results in terms of martensite content, an analytical model is here formulated to correlate the stress-strain relationship to the phase transition mechanisms. Finally, a validation of the present model by means of experimental data pertaining the stress-strain relationship is performed.
MECHANICAL BEHAVIOUR AND PHASE TRANSITION MECHANISMS OF A SHAPE MEMORY ALLOY BY MEANS OF A NOVEL ANALYTICAL MODEL / Carpinteri, Andrea; DI COCCO, Vittorio; Fortese, Giovanni; Iacoviello, Francesco; Natali, Stefano; Ronchei, Camilla; Scorza, Daniela; Vantadori, Sabrina; Zanichelli, Andrea. - In: ACTA MECHANICA ET AUTOMATICA. - ISSN 1898-4088. - 12:2(2018), pp. 105-108. [10.2478/ama-2018-0017]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2848590
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