de Castro Bubani, Franco (2014) Desarrollo de materiales con memoria de forma de alta histéresis para disipación de energía en estructuras sismorresistentes. / Development of high hysteresis shape-memory materials for energy dissipation in seismic-resistant structures. Tesis Doctoral en Ciencias de la Ingeniería, Universidad Nacional de Cuyo, Instituto Balseiro.
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| PDF (Tesis) Español 2236Kb |
Resumen en español
En esta tesis, las propiedades mecánicas de monocristales de CuZnAl y CuAlBe con efecto memoria son estudiadas, con vistas a posibles aplicaciones en estructuras sismorresistentes. Con el objetivo de optimizar las propiedades relacionadas a la amortiguación de vibraciones mecánicas, se estudia el efecto de la introducción de precipitados de otras fases sobre la formación de la martensita 6R. Se estudia el comportamiento mecánico asociado a la transformación secuencial martensita-martensita, a partir de la fase 18R hacia la estructura martensítica 6R, a distintas velocidades, en monocristales CuZnAl. La capacidad de amortiguación es evaluada por medio de un prototipo y un modelo numérico con un grado de libertad. Los resultados obtenidos indican que la histéresis asociada a las transformaciones martensíticas en monocristales de CuZnAl con precipitados puede ser aprovechada en sistemas amortiguadores de oscilaciones mecánicas.
Resumen en inglés
In this thesis, the mechanical properties of CuZnAl and CuAlBe shape-memory alloy single crystals are studied, aiming at possible applications in seismic-resistant structures. The effect of the introduction of precipitates of other phases on the formation of 6R martensite is studied, with the objective of optimizing the properties related to the damping of mechanical vibrations. The mechanical behavior associated with the sequential martensite-martensite transformation from the 18R phase to the 6R martensite, at different speeds, is studied in CuZnAl single crystals. Damping capacity is assessed by using a prototype and a numeric model with one degree of freedom. The results obtained show that the hysteresis associated with the martensitic transformations in CuZnAl single crystals with precipitates can be used in mechanical damping systems.
| Tipo de objeto: | Tesis (Tesis Doctoral en Ciencias de la Ingeniería) |
|---|---|
| Palabras Clave: | Shape memory effect; Efecto memoria forma; Precipitation; Precipitación; Mechanical properties; Propiedades mecánicas; [Martensitic transformations; Transformaciones matensíticas; Pseudoelasticity; Pseudoelasticidad; Cu-base alloys; aleaciones base Cu] |
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| Materias: | Física > Física de materiales Química > Materiales Física > Sismología Metalurgia > Transformaciones de fase Metalurgia > Aleaciones |
| Divisiones: | Investigación y aplicaciones no nucleares > Física > Física de metales |
| Código ID: | 482 |
| Depositado Por: | Marisa G. Velazco Aldao |
| Depositado En: | 14 Abr 2015 18:07 |
| Última Modificación: | 14 Abr 2015 18:13 |
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