{"id":119720,"date":"2023-02-08T20:49:17","date_gmt":"2023-02-08T19:49:17","guid":{"rendered":"https:\/\/material-properties.org\/o-que-e-dureza-de-ligas-de-magnesio-definicao\/"},"modified":"2023-02-17T07:48:42","modified_gmt":"2023-02-17T06:48:42","slug":"o-que-e-dureza-de-ligas-de-magnesio-definicao","status":"publish","type":"post","link":"https:\/\/material-properties.org\/pt-br\/o-que-e-dureza-de-ligas-de-magnesio-definicao\/","title":{"rendered":"O que \u00e9 Dureza de Ligas de Magn\u00e9sio &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Dureza das Ligas de Magn\u00e9sio.\u00a0A dureza Brinell do Elektron 21 &#8211; UNS M12310 \u00e9 de aproximadamente 70 HB.\u00a0Alum\u00ednio, zinco, zirc\u00f4nio e t\u00f3rio promovem o endurecimento por precipita\u00e7\u00e3o<\/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><strong><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/magnesium-alloy-elektron-image-min.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-29738\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/magnesium-alloy-elektron-image-min-300x300.png\" alt=\"Ligas de magn\u00e9sio\" width=\"300\" height=\"300\" \/><\/a><span>Ligas de magn\u00e9sio<\/span><\/strong><span>\u00a0s\u00e3o misturas de magn\u00e9sio e outros metais de liga, geralmente alum\u00ednio, zinco, sil\u00edcio, mangan\u00eas, cobre e zirc\u00f4nio.\u00a0Como a caracter\u00edstica mais not\u00e1vel do magn\u00e9sio \u00e9 sua\u00a0<\/span><strong><span>densidade, 1,7 g\/cm<\/span><sup><span>3<\/span><\/sup><\/strong><span>, suas ligas s\u00e3o usadas onde o peso leve \u00e9 \u200b\u200buma considera\u00e7\u00e3o importante (por exemplo, em componentes de aeronaves).\u00a0O magn\u00e9sio tem o\u00a0<\/span><strong><span>ponto de fus\u00e3o mais baixo <\/span><\/strong><span>(923 K (1202\u00b0F)) de todos os metais alcalino-terrosos. O magn\u00e9sio puro tem uma estrutura cristalina HCP, \u00e9 relativamente macio e tem um baixo m\u00f3dulo de elasticidade: 45 GPa.\u00a0As ligas de magn\u00e9sio tamb\u00e9m possuem uma estrutura treli\u00e7ada hexagonal, que afeta as propriedades fundamentais dessas ligas.\u00a0\u00c0 temperatura ambiente, o magn\u00e9sio e suas ligas s\u00e3o dif\u00edceis de realizar trabalho a frio devido ao fato de que a deforma\u00e7\u00e3o pl\u00e1stica da rede hexagonal \u00e9 mais complicada do que em metais de rede c\u00fabica como alum\u00ednio, cobre e a\u00e7o.\u00a0Portanto, as ligas de magn\u00e9sio s\u00e3o normalmente usadas como\u00a0<\/span><strong><span>ligas fundidas<\/span><\/strong><span>.\u00a0Apesar da natureza reativa do p\u00f3 de magn\u00e9sio puro, o magn\u00e9sio met\u00e1lico e suas ligas t\u00eam boa resist\u00eancia \u00e0 corros\u00e3o.<\/span><\/p>\n<p><span>O alum\u00ednio \u00e9 o elemento de liga mais comum.\u00a0Alum\u00ednio, zinco, zirc\u00f4nio e t\u00f3rio promovem o endurecimento por precipita\u00e7\u00e3o: o mangan\u00eas melhora a resist\u00eancia \u00e0 corros\u00e3o;\u00a0e o estanho melhora a fundibilidade.<\/span><\/p>\n<h2><span>Dureza das Ligas de Magn\u00e9sio<\/span><\/h2>\n<p><span>A dureza Brinell do\u00a0<\/span><strong><span>Elektron 21 &#8211; UNS M12310<\/span><\/strong><span>\u00a0\u00e9 de aproximadamente 70 HB.<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/table-brinell-hardness-numbers.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-full wp-image-28044\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/table-brinell-hardness-numbers.png\" alt=\"n\u00famero de dureza Brinell\" width=\"288\" height=\"297\" \/><\/a><\/p>\n<p><strong><span>O teste de dureza Rockwell<\/span><\/strong><span> \u00e9 um dos testes de dureza de indenta\u00e7\u00e3o mais comuns, que foi desenvolvido para testes de dureza.\u00a0Em contraste com o teste Brinell, o testador Rockwell mede a profundidade de penetra\u00e7\u00e3o de um penetrador sob uma grande carga (carga principal) em compara\u00e7\u00e3o com a penetra\u00e7\u00e3o feita por uma pr\u00e9-carga (carga menor).\u00a0A carga menor estabelece a posi\u00e7\u00e3o zero.\u00a0A carga principal \u00e9 aplicada e, em seguida, removida, mantendo a carga secund\u00e1ria.\u00a0A diferen\u00e7a entre a profundidade de penetra\u00e7\u00e3o antes e depois da aplica\u00e7\u00e3o da carga principal \u00e9 usada para calcular o <\/span><strong><span>n\u00famero de dureza Rockwell<\/span><\/strong><span>.\u00a0Ou seja, a profundidade de penetra\u00e7\u00e3o e a dureza s\u00e3o inversamente proporcionais.\u00a0A principal vantagem da dureza Rockwell \u00e9 sua capacidade de <\/span><strong><span>exibir valores de dureza diretamente<\/span><\/strong><span>.\u00a0O resultado \u00e9 um n\u00famero adimensional anotado como <\/span><strong><span>HRA, HRB, HRC<\/span><\/strong><span>, etc., onde a \u00faltima letra \u00e9 a respectiva escala Rockwell.<\/span><\/p>\n<p><span>O teste Rockwell C \u00e9 realizado com um penetrador Brale (<\/span><strong><span>cone de diamante de 120\u00b0<\/span><\/strong><span>) e uma carga maior de 150kg.<\/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>Refer\u00eancias:<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">Ci\u00eancia dos Materiais:<\/div><\/div><\/div><\/span><\/p>\n<p><span>Departamento de Energia dos EUA, Ci\u00eancia de Materiais.\u00a0DOE Fundamentals Handbook, Volume 1 e 2. Janeiro de 1993.<\/span><br \/>\n<span>Departamento de Energia dos EUA, Ci\u00eancia de Materiais.\u00a0DOE Fundamentals Handbook, Volume 2 e 2. Janeiro de 1993.<\/span><br \/>\n<span>William D. Callister, David G. Rethwisch.\u00a0Ci\u00eancia e Engenharia de Materiais: Uma Introdu\u00e7\u00e3o 9\u00aa Edi\u00e7\u00e3o, Wiley;\u00a09 edi\u00e7\u00e3o (4 de dezembro de 2013), ISBN-13: 978-1118324578.<\/span><br \/>\n<span>Eberhart, Mark (2003).\u00a0Por que as coisas quebram: entendendo o mundo pela maneira como ele se desfaz.\u00a0Harmonia.\u00a0ISBN 978-1-4000-4760-4.<\/span><br \/>\n<span>Gaskell, David R. (1995).\u00a0Introdu\u00e7\u00e3o \u00e0 Termodin\u00e2mica dos Materiais (4\u00aa ed.).\u00a0Editora Taylor e Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><br \/>\n<span>Gonz\u00e1lez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Uma Introdu\u00e7\u00e3o \u00e0 Ci\u00eancia dos Materiais.\u00a0Princeton University Press.\u00a0ISBN 978-0-691-07097-1.<\/span><br \/>\n<span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Materiais: engenharia, ci\u00eancia, processamento e design (1\u00aa ed.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><br \/>\n<span>JR Lamarsh, AJ Baratta, Introdu\u00e7\u00e3o \u00e0 Engenharia Nuclear, 3\u00aa ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1.<\/span><br \/>\n<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<p><span>Veja acima:<\/span><br \/>\n<span>Ligas de magn\u00e9sio<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/metals-what-are-metals\/alloys-composition-properties-of-metal-alloys\/magnesium-alloys\/ \" 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\"><i class=\"sui sui-link\" style=\"font-size:16px;color:#5d5d5d\"><\/i> <\/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>Esperamos que este artigo,\u00a0<\/span><strong><span>Dureza das Ligas de Magn\u00e9sio<\/span><\/strong><span>, o ajude.\u00a0Se sim,\u00a0<\/span><strong><span>d\u00ea um like<\/span><\/strong><span>\u00a0na barra lateral.\u00a0O objetivo principal deste site \u00e9 ajudar o p\u00fablico a aprender algumas informa\u00e7\u00f5es interessantes e importantes sobre materiais e suas propriedades.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Esperamos que este artigo,\u00a0Dureza das Ligas de Magn\u00e9sio, o ajude.\u00a0Se sim,\u00a0d\u00ea um like\u00a0na barra lateral.\u00a0O objetivo principal deste site \u00e9 ajudar o p\u00fablico a aprender algumas informa\u00e7\u00f5es interessantes e importantes sobre materiais e suas propriedades. &nbsp;<\/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>O que \u00e9 Dureza de Ligas de Magn\u00e9sio - Defini\u00e7\u00e3o | Propriedades do material<\/title>\n<meta name=\"description\" content=\"Dureza de Ligas de Magn\u00e9sio. 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