{"id":34231,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/cambios-microestructurales-durante-la-deformacion-de-dos-aleaciones-superplasticas-de-pequeno-tamano-de-grano-al-6cu-04zr-y-al-5mg-12cr\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"cambios-microestructurales-durante-la-deformacion-de-dos-aleaciones-superplasticas-de-pequeno-tamano-de-grano-al-6cu-04zr-y-al-5mg-12cr","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/cambios-microestructurales-durante-la-deformacion-de-dos-aleaciones-superplasticas-de-pequeno-tamano-de-grano-al-6cu-04zr-y-al-5mg-12cr\/","title":{"rendered":"Cambios microestructurales durante la deformacion de dos aleaciones superplasticas de peque\u00f1o tama\u00f1o de grano, al-6%cu-0,4%zr y al-5%mg-1,2%cr."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Eddahbi Mohamed Ou Lahcen <\/strong><\/h2>\n<p>El comportamiento superpl\u00e1stico de los materiales en general y de aleaciones de base aluminio en particular est\u00e1 basado, usualmente, en la presencia de una microestructura de granos finos de menos de 15  m, completamente recristalizados, y de fronteras de grano de gran \u00e1ngulo que sirven de soporte para un deslizamiento de fronteras de grano entre granos contiguos. Sin embargo, algunos autores sugieren que durante la deformaci\u00f3n superpl\u00e1stica de determinadas aleaciones de aluminio que han sido fuertemente trabajadas en fr\u00edo antes de la deformaci\u00f3n superpl\u00e1stica, puede ocurrir un mecanismo de recristalizaci\u00f3n din\u00e1mica, es decir, una recristalizaci\u00f3n ayudada por la deformaci\u00f3n durante el ensayo de tracci\u00f3n. Estos materiales tienen una subestructura de celdas y subgranos que encierran una alta densidad de dislocaciones. En general, el comportamiento superpl\u00e1stico ocurre a altas temperaturas y depende sensiblemente del tama\u00f1o de grano y de la fracci\u00f3n en volumen y la dispersi\u00f3n de part\u00edculas de segunda fase en la matriz. Por otro lado, es evidente que el fen\u00f3meno de recristalizaci\u00f3n requiere centros de nucleaci\u00f3n. As\u00ed, se espera que en el material con part\u00edculas gruesas, la deformaci\u00f3n en fr\u00edo pueda producir concentraci\u00f3n de tensiones a su alrededor. Estas concentraciones se consideran como puntos potenciales de nucleaci\u00f3n tanto para la recristalizaci\u00f3n est\u00e1tica (s\u00f3lo por efecto de la temperatura) como para la din\u00e1mica. Si adem\u00e1s el material contiene part\u00edculas peque\u00f1as, se puede pensar que \u00e9stas puedan suprimir el movimiento masivo de las fronteras de gran \u00e1ngulo. Con estas consideraciones en mente, se desea estudiar el comportamiento tanto mec\u00e1nico como microestructural durante la deformaci\u00f3n superpl\u00e1stica de dos aleaciones de base aluminio:  al-6%cu-0,4%zr y al-5%mg-1,2%cr(en masa). La primera aleaci\u00f3n presenta una microestructura, en estado de recepci\u00f3n, muy deformada que se caracteriza por<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Cambios microestructurales durante la deformacion de dos aleaciones superplasticas de peque\u00f1o tama\u00f1o de grano, al-6%cu-0,4%zr y al-5%mg-1,2%cr.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Cambios microestructurales durante la deformacion de dos aleaciones superplasticas de peque\u00f1o tama\u00f1o de grano, al-6%cu-0,4%zr y al-5%mg-1,2%cr. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Eddahbi Mohamed Ou Lahcen <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/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: Paloma Fern\u00e1ndez S\u00e1nchez <\/li>\n<li>Jos\u00e9 Mar\u00eda Bad\u00eda P\u00e9rez (vocal)<\/li>\n<li>Arturo Dom\u00ednguez Rodr\u00edguez (vocal)<\/li>\n<li>Manuel Carsi Cebrian (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Eddahbi Mohamed Ou Lahcen El comportamiento superpl\u00e1stico de los materiales en general y de aleaciones de base [&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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