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
Natali, Stefano;
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.File | Dimensione | Formato | |
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