{"id":116773,"date":"2022-05-24T00:25:00","date_gmt":"2022-05-23T23:25:00","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-le-test-de-durete-knoop-numero-de-durete-knoop-definition\/"},"modified":"2022-05-25T06:13:01","modified_gmt":"2022-05-25T05:13:01","slug":"quest-ce-que-le-test-de-durete-knoop-numero-de-durete-knoop-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-le-test-de-durete-knoop-numero-de-durete-knoop-definition\/","title":{"rendered":"Qu&rsquo;est-ce que le test de duret\u00e9 Knoop &#8211; Num\u00e9ro de duret\u00e9 Knoop &#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 m\u00e9thode de test de duret\u00e9 Knoop fait partie des tests de microduret\u00e9 &#8211; tests de duret\u00e9 m\u00e9canique utilis\u00e9s en particulier pour les mat\u00e9riaux tr\u00e8s fragiles ou les t\u00f4les minces, o\u00f9 seule une petite indentation peut \u00eatre faite \u00e0 des fins de test.<\/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 duret\u00e9 d&rsquo;indentation mesure la capacit\u00e9 \u00e0 r\u00e9sister \u00e0\u00a0<\/span><strong><span>l&rsquo;indentation de surface<\/span><\/strong><span>\u00a0(d\u00e9formation plastique localis\u00e9e) et la r\u00e9sistance d&rsquo;un \u00e9chantillon \u00e0 la d\u00e9formation du mat\u00e9riau due \u00e0 une charge de compression constante d&rsquo;un objet pointu.\u00a0Les tests de duret\u00e9 par indentation sont principalement utilis\u00e9s dans les domaines de l&rsquo;ing\u00e9nierie et de la m\u00e9tallurgie.\u00a0Les m\u00e9thodes traditionnelles sont bas\u00e9es sur des tests physiques de duret\u00e9 par empreinte bien d\u00e9finis.\u00a0Des p\u00e9n\u00e9trateurs tr\u00e8s durs de g\u00e9om\u00e9tries et de tailles d\u00e9finies sont enfonc\u00e9s en continu dans le mat\u00e9riau sous une force particuli\u00e8re.\u00a0Les param\u00e8tres de d\u00e9formation, tels que la profondeur d&rsquo;indentation dans la m\u00e9thode Rockwell, sont enregistr\u00e9s pour donner des mesures de duret\u00e9.\u00a0Les \u00e9chelles de duret\u00e9 d&rsquo;indentation courantes sont\u00a0<\/span><strong><span>Brinell<\/span><\/strong><span>,\u00a0<\/span><strong><span>Rockwell<\/span><\/strong><span>\u00a0et\u00a0<\/span><strong><span>Vickers<\/span><\/strong><span>.<\/span><\/p>\n<p><span>Voir aussi: <\/span><a href=\"https:\/\/material-properties.org\/what-is-hardness-definition\/\"><span>Duret\u00e9<\/span><\/a><\/p>\n<h3><span>Test de duret\u00e9 des boutons<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/table-knoop-hardness-numbers.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-full wp-image-28045\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/table-knoop-hardness-numbers.png\" alt=\"nombres de duret\u00e9 knoop\" width=\"289\" height=\"233\" \/><\/a><span>La m\u00e9thode de\u00a0<\/span><strong><span>test de duret\u00e9 Knoop<\/span><\/strong><span>\u00a0fait partie des tests de\u00a0<\/span><strong><span>microduret\u00e9<\/span><\/strong><span>\u00a0&#8211; tests de duret\u00e9 m\u00e9canique utilis\u00e9s en particulier pour les mat\u00e9riaux tr\u00e8s fragiles ou les t\u00f4les minces, o\u00f9 seule une petite indentation peut \u00eatre r\u00e9alis\u00e9e \u00e0 des fins de test.\u00a0Les techniques Knoop et Vickers sont appel\u00e9es m\u00e9thodes de test de microindentation sur la base de la taille du p\u00e9n\u00e9trateur.\u00a0Les deux sont bien adapt\u00e9s pour mesurer la duret\u00e9 de petites r\u00e9gions d&rsquo;\u00e9chantillons s\u00e9lectionn\u00e9es\u00a0;\u00a0de plus, la technique de Knoop est utilis\u00e9e pour tester des mat\u00e9riaux fragiles tels que la c\u00e9ramique.\u00a0La g\u00e9om\u00e9trie de ce p\u00e9n\u00e9trateur est une pyramide \u00e9tendue avec un rapport longueur\/largeur de 7:1 et des angles de face respectifs de 172 degr\u00e9s pour le bord long et de 130 degr\u00e9s pour le bord court.<\/span><\/p>\n<p><span>Les nombres de duret\u00e9 Knoop et Vickers sont d\u00e9sign\u00e9s par HK et HV, respectivement, et les \u00e9chelles de duret\u00e9 pour les deux techniques sont approximativement \u00e9quivalentes.\u00a0Le nombre de duret\u00e9 Knoop HK ou est donn\u00e9 par la formule:<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Knoop-hardness-number-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-28043\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Knoop-hardness-number-definition.png\" alt=\"Num\u00e9ro de duret\u00e9 Knoop\" width=\"516\" height=\"199\" \/><\/a><\/p>\n<p><span>Voir aussi: <\/span><a href=\"https:\/\/material-properties.org\/what-is-brinell-hardness-test-definition\/\"><span>Essai de duret\u00e9 Brinell<\/span><\/a><\/p>\n<p><span>Voir aussi: <\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/hardness\/rockwell-hardness-test\/\"><span>Test de duret\u00e9 Rockwell<\/span><\/a><\/p>\n<p><span>Voir aussi: <\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/hardness\/vickers-hardness-test-vickers-hardness-number\/\"><span>Test de duret\u00e9 Vickers<\/span><\/a><\/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>Duret\u00e9<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/hardness\/\" 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>Knoop Hardness Test &#8211; Knoop Hardness Number<\/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,\u00a0Knoop Hardness Test &#8211; Knoop Hardness Number, 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 - 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