{"id":3110,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/propiedades-mecanicas-a-alta-temperatura-de-aleaciones-pulvimetalurgicas-de-base-al-fe-obtenidas-por-solidificacion-rapida\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"propiedades-mecanicas-a-alta-temperatura-de-aleaciones-pulvimetalurgicas-de-base-al-fe-obtenidas-por-solidificacion-rapida","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/propiedades-mecanicas-a-alta-temperatura-de-aleaciones-pulvimetalurgicas-de-base-al-fe-obtenidas-por-solidificacion-rapida\/","title":{"rendered":"Propiedades mecanicas a alta temperatura de aleaciones pulvimetalurgicas de base al-fe obtenidas por solidificacion rapida."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Fernando Carre\u00f1o Gorostiaga <\/strong><\/h2>\n<p>Se han estudiado diez aleaciones de composicion al-fe-x-si (donde x=cr, mn, mo o v), obtenidas mediante solidificacion rapida y consolidadas por metodos pulvimetalurgicos, que presentan de 16 a 36% de precipitados esfericos, de unos 70 nm diametro, y 1 m de tama\u00f1o de grano. Los valores aparentes del exponente de la tension, nap, y de la energia de activacion para la fluencia, qap, son muy elevados comparados con los del aluminio puro y dependen de la temperatura de ensayo.  los modelos de subestructura constante con tension umbral, de tension umbral asociada a la interaccion dislocacion-precipitado, de interaccion atractiva dislocacion-precipitado y de volumen de activacion no describe adecuadamente el comportamiento en fluencia de las aleaciones estudiadas. Se ha desarrollado un nuevo modelo fenomeno-logico que predice satisfactoriamente los resultados experimentales. La interaccion dislocacion-precipitado eleva el exponente de la tension en un valor \u00f1, independiente de la temperatura. El comportamiento de la matriz se caracteriza experimentalmente por un exponente h. Este modelo predice una energia de activacion aparente que corresponde a la de la autodifusion a traves de la red corregida por el factor (\u00f1 + h)\/h.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Propiedades mecanicas a alta temperatura de aleaciones pulvimetalurgicas de base al-fe obtenidas por solidificacion rapida.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Propiedades mecanicas a alta temperatura de aleaciones pulvimetalurgicas de base al-fe obtenidas por solidificacion rapida. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Fernando Carre\u00f1o Gorostiaga <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1994<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>\u00f3scar Antonio Ruano Mari\u00f1o<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Arturo Dom\u00ednguez Rodr\u00edguez <\/li>\n<li>Angel Lopez Echarri (vocal)<\/li>\n<li> Torralba Diaz (vocal)<\/li>\n<li>Jos\u00e9 Mar\u00eda Bad\u00eda P\u00e9rez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Fernando Carre\u00f1o Gorostiaga Se han estudiado diez aleaciones de composicion al-fe-x-si (donde x=cr, mn, mo o v), [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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