Autor segons l'article: Fabregat Sanjuan, A.; Gispert-Guirado, F.; Ferrando, F.; De la Flor, S.
Departament: Enginyeria Mecànica
Autor/s de la URV: FABREGAT SANJUAN, ALBERT; GISPERT GUIRADO, FRANCESC; FERRANDO PIERA, FRANCESC; DE LA FLOR LOPEZ, SILVIA
Resum: The properties of NiTiCu alloys strongly depend on their microstructure, which is greatly influenced by the temperature
of the heat treatment (HT) carried out as a final step in their processing. This study investigates the
effect of HT temperatures on the Ti50Ni45Cu5 alloy using dynamic mechanical analysis (DMA). To confirm the
results obtained by the DMA as regards the effects of HT on the microstructure, they were checked against differential
scanning calorimetry (DSC), synchrotron X-ray diffraction (SXRD), hardness measurement and stress-strain
tests. By combining all these experimental techniques with the DMA measurements, the effects of the HT were
determined and attributed to different factors: density dislocation morphology introduced by prior cold work,
recovery and recrystallization processes with texture changes, grain growth, precipitation processes and wt%)
of retained martensite. The results showed that low HT temperatures (400 and 450 °C) are not high enough to
eliminate the effects of the cold work but do provide suitable mechanical properties and lower transformation
temperatures. Medium temperatures (500–575 °C) lead to higher transformation temperatures and maximum
martensitic transformation capacity (ΔH and tan δ) because of the recovery and recrystallization process, but
they also cause a reduction in the mechanical properties (slip stress). High temperatures (600 and 650 °C) produce
a reduction in transformation capacity and a huge decrease in the mechanical properties (slip stress and
ultimate tensile stress).
Grup de recerca: Grup d'Investigació en Enginyeria Computacional i Experimental
Àrees temàtiques: Mechanical engineering Ingeniería mecánica Enginyeria mecànica
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0921-5093
Identificador de l'autor: 0000-0002-2878-1369; ; 0000-0003-4450-2734; 0000-0002-6851-1371
Data d'alta del registre: 2018-02-27
Pàgina final: 291
Volum de revista: 712
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2018
Pàgina inicial: 281
Tipus de publicació: Article Artículo Article
Repositori URV