Publication: Estudio del efecto de la irradiación en aceros inoxidables 316 (Study of irradiation effect on the stainless steels type 316)
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2011
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Abstract
Los cambios en la microestructura inducidas por la radiación neutrónica contribuyen de manera importante en el comportamiento de los componentes internos bajo operación de los reactores nucleares. La radiación neutrónica induce defectos en la microestructura en forma de bucles de dislocación y también la redistribución de átomos de soluto e impurezas. En la serie 300, los aceros inoxidables austeníticos, materiales estructurales comunes usados en los componentes del núcleo de los reactores de agua ligera, la radiación produce cambios en las propiedades tales como endurecimiento, hinchamiento, fragilización que pueden ser relacionadas con los cambios en la microestructura causados por la irradiación. El objetivo del trabajo que se presenta aquí es caracterizar la microestructura de algunos materiales que se han sometido a irradiación para contribuir a la comprensión del comportamiento de estos materiales bajo irradiación. Se exponen los resultados preliminaries obtenidos mediante Microscopía Electrónica de Transmisión (MET). Los materiales se irradiaron con iones como una manera de simular el daño que produce la radiación neutrónica. Se han obtenido indicaciones del efecto de la dosis y de la temperatura de irradiación. [ABSTRACT] The alterations in the microstructure induced by neutron irradiation are important contributors to the behaviour of the internal components under operation in the nuclear reactor. Neutron irradiation induces defects in the microstructure in the form of dislocation loops as well as the redistribution of the solute atoms and impurities. In 300 series austenitic stainless steels, the common structural materials used in light water reactor (LWR) core components, the radiation produces property changes such as hardening, swelling or embrittlement that can be directly related to changes in the microstructure caused by radiation. The aim of the work presented here is to characterize the microstructure of some materials that have suffered irradiation damage in order to understand the behavior of these materials. Preliminary results obtained by Transmission Electron Microscopy (TEM) characterization of irradiated materials are presented. The materials have been irradiated with ions as a way of simulate neutron irradiation damage. Indications of the effect of dose and irradiation temperature have been obtained and are explained.
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Máster en Física Aplicada. Facultad de Ciencias Físicas. Curso 2010-2011
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