{"id":116824,"date":"2022-05-24T17:56:12","date_gmt":"2022-05-24T16:56:12","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-ductilite-et-la-tenacite-definition\/"},"modified":"2022-05-25T09:29:54","modified_gmt":"2022-05-25T08:29:54","slug":"quest-ce-que-la-ductilite-et-la-tenacite-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-ductilite-et-la-tenacite-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la ductilit\u00e9 et la t\u00e9nacit\u00e9 &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">La t\u00e9nacit\u00e9 combine r\u00e9sistance et ductilit\u00e9 en une seule propri\u00e9t\u00e9 mesurable et n\u00e9cessite un \u00e9quilibre entre r\u00e9sistance et ductilit\u00e9.\u00a0Ductilit\u00e9 et t\u00e9nacit\u00e9<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span>La ductilit\u00e9 est plus commun\u00e9ment d\u00e9finie comme la capacit\u00e9 d&rsquo;un mat\u00e9riau \u00e0 se d\u00e9former facilement lors de l&rsquo;application d&rsquo;une force de traction, ou comme la capacit\u00e9 d&rsquo;un mat\u00e9riau \u00e0 r\u00e9sister \u00e0 la d\u00e9formation plastique sans rupture.\u00a0<\/span><strong><span>La ductilit\u00e9<\/span><\/strong><span>\u00a0est un facteur important permettant \u00e0 une structure de survivre \u00e0 des charges extr\u00eames, telles que celles dues \u00e0 de grands changements de pression, des tremblements de terre et des ouragans, sans subir de d\u00e9faillance ou d&rsquo;effondrement soudain.\u00a0Il est d\u00e9fini comme:<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/ductility-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-27933\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/ductility-definition.png\" alt=\"Ductilit\u00e9\" width=\"476\" height=\"141\" \/><\/a><\/p>\n<p><span>La ductilit\u00e9 peut \u00e9galement \u00eatre consid\u00e9r\u00e9e en termes d&rsquo;aptitude au pliage et d&rsquo;\u00e9crasement.\u00a0Habituellement, si deux mat\u00e9riaux ont la m\u00eame r\u00e9sistance et la m\u00eame duret\u00e9, celui qui a la ductilit\u00e9 la plus \u00e9lev\u00e9e est plus souhaitable.\u00a0La ductilit\u00e9 de nombreux m\u00e9taux peut changer si les conditions sont modifi\u00e9es.\u00a0Une augmentation de la temp\u00e9rature augmentera la ductilit\u00e9.\u00a0Une diminution de la temp\u00e9rature entra\u00eenera une diminution de la ductilit\u00e9 et un changement de comportement ductile \u00e0 fragile.\u00a0La rupture ductile (rupture par cisaillement) est meilleure que la rupture fragile, car il y a une propagation lente et une absorption d&rsquo;une grande quantit\u00e9 d&rsquo;\u00e9nergie avant la rupture.\u00a0La ductilit\u00e9 est souhaitable dans les applications \u00e0 haute temp\u00e9rature et haute pression dans les r\u00e9acteurs en raison des contraintes suppl\u00e9mentaires sur les m\u00e9taux.\u00a0La ductilit\u00e9 \u00e9lev\u00e9e dans ces applications aide \u00e0 pr\u00e9venir les ruptures fragiles.\u00a0La ductilit\u00e9 contribue \u00e9galement \u00e0 une autre propri\u00e9t\u00e9 mat\u00e9rielle appel\u00e9e <\/span><strong><span>duret\u00e9.\u00a0<\/span><\/strong><strong><span>La t\u00e9nacit\u00e9<\/span><\/strong><span>\u00a0combine\u00a0<\/span><strong><span>r\u00e9sistance et ductilit\u00e9<\/span><\/strong><span>\u00a0en une seule propri\u00e9t\u00e9 mesurable et n\u00e9cessite un \u00e9quilibre entre r\u00e9sistance et ductilit\u00e9.<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Stress-strain-curves-Ductile-vs-Brittle-Material.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-27800\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Stress-strain-curves-Ductile-vs-Brittle-Material-300x273.png\" alt=\"Courbes contrainte-d\u00e9formation - Mat\u00e9riau ductile vs cassant\" width=\"300\" height=\"273\" \/><\/a><span>La t\u00e9nacit\u00e9 est la capacit\u00e9 d&rsquo;un mat\u00e9riau \u00e0 absorber de l&rsquo;\u00e9nergie et \u00e0 se d\u00e9former plastiquement sans se fracturer.\u00a0Une d\u00e9finition de la t\u00e9nacit\u00e9 (ou plus pr\u00e9cis\u00e9ment de\u00a0<\/span><strong><span>la t\u00e9nacit\u00e9<\/span><\/strong><span>\u00a0\u00e0 la rupture ) est qu&rsquo;il s&rsquo;agit d&rsquo;une propri\u00e9t\u00e9 qui indique la r\u00e9sistance d&rsquo;un mat\u00e9riau \u00e0 la rupture lorsqu&rsquo;une fissure (ou un autre d\u00e9faut de concentration de contrainte) est pr\u00e9sente.\u00a0<\/span><strong><span>La t\u00e9nacit\u00e9<\/span><\/strong><span>\u00a0est g\u00e9n\u00e9ralement mesur\u00e9e par le test Charpy ou le test Izod.\u00a0Le test d&rsquo;impact mesure la t\u00e9nacit\u00e9 dans des conditions de chargement soudain et la pr\u00e9sence de d\u00e9fauts tels que des encoches ou des fissures qui concentreront les contraintes aux points faibles.\u00a0La t\u00e9nacit\u00e9 peut \u00e9galement \u00eatre d\u00e9finie par rapport aux r\u00e9gions d&rsquo;un\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-stress-strain-curve-stress-strain-diagram-definition\/\"><span>diagramme contrainte-d\u00e9formation<\/span><\/a><span>.\u00a0La t\u00e9nacit\u00e9 est li\u00e9e \u00e0 la\u00a0<\/span><strong><span>surface sous la courbe contrainte-d\u00e9formation<\/span><\/strong><span>.\u00a0La courbe contrainte-d\u00e9formation mesure la t\u00e9nacit\u00e9 sous une charge progressivement croissante.\u00a0Pour \u00eatre r\u00e9sistant, un mat\u00e9riau doit \u00eatre \u00e0 la fois solide et ductile.\u00a0La figure suivante montre une courbe contrainte-d\u00e9formation typique d&rsquo;un mat\u00e9riau ductile et d&rsquo;un mat\u00e9riau fragile.\u00a0Par exemple, les mat\u00e9riaux fragiles (comme la c\u00e9ramique) qui sont solides mais avec une ductilit\u00e9 limit\u00e9e ne sont pas r\u00e9sistants ;\u00a0\u00e0 l&rsquo;inverse, les mat\u00e9riaux tr\u00e8s ductiles avec de faibles r\u00e9sistances ne sont pas non plus tenaces.\u00a0Pour \u00eatre r\u00e9sistant, un mat\u00e9riau doit r\u00e9sister \u00e0 la fois \u00e0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/what-is-stress-in-materials-science\/\"><strong><span>des contraintes \u00e9lev\u00e9es<\/span><\/strong><\/a><span>\u00a0et\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/strain\/\"><span>\u00e0 des d\u00e9formations \u00e9lev\u00e9es<\/span><\/a><span>.<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span><div class=\"su-accordion su-u-trim\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>References :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\u00a0<\/div><\/div><\/div><\/span><strong><span>Science des mat\u00e9riaux:<\/span><\/strong><\/p>\n<ol>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span><\/li>\n<li><span>William D. Callister, David G. Rethwisch.\u00a0Science et g\u00e9nie des mat\u00e9riaux : une introduction 9e \u00e9dition, Wiley ;\u00a09 \u00e9dition (4 d\u00e9cembre 2013), ISBN-13\u00a0: 978-1118324578.<\/span><\/li>\n<li><span>En ligneEberhart, Mark (2003).\u00a0Pourquoi les choses se cassent\u00a0: Comprendre le monde par la mani\u00e8re dont il se d\u00e9compose.\u00a0Harmonie.\u00a0ISBN 978-1-4000-4760-4.<\/span><\/li>\n<li><span>Gaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><\/li>\n<li><span>Gonzalez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1<\/span><\/li>\n<li><span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Mat\u00e9riaux: ing\u00e9nierie, science, traitement et conception (1\u00e8re \u00e9d.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><\/li>\n<li><span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<\/ol>\n<p><span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div class=\"su-divider su-divider-style-default\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Voir au dessus:<\/span><\/h2>\n<p><span>Ductilit\u00e9<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/ductility\/\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a><\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Ductilit\u00e9 et t\u00e9nacit\u00e9<\/span><\/strong><span>, vous aidera.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous esp\u00e9rons que cet article,\u00a0Ductilit\u00e9 et t\u00e9nacit\u00e9, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la ductilit\u00e9 et la t\u00e9nacit\u00e9 - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"La t\u00e9nacit\u00e9 combine r\u00e9sistance et ductilit\u00e9 en une seule propri\u00e9t\u00e9 mesurable et n\u00e9cessite un \u00e9quilibre entre r\u00e9sistance et ductilit\u00e9. 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