{"id":119687,"date":"2023-02-08T03:27:11","date_gmt":"2023-02-08T02:27:11","guid":{"rendered":"https:\/\/material-properties.org\/o-que-e-resistencia-e-dureza-de-constantan-45ni-55cu-definicao\/"},"modified":"2023-02-15T09:04:27","modified_gmt":"2023-02-15T08:04:27","slug":"o-que-e-resistencia-e-dureza-de-constantan-45ni-55cu-definicao","status":"publish","type":"post","link":"https:\/\/material-properties.org\/pt-br\/o-que-e-resistencia-e-dureza-de-constantan-45ni-55cu-definicao\/","title":{"rendered":"O que \u00e9 Resist\u00eancia e Dureza de Constantan \u2013 45Ni-55Cu &#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\">For\u00e7a e Dureza de Constantan \u2013 45Ni-55Cu.\u00a0A resist\u00eancia \u00e0 tra\u00e7\u00e3o final de constantan \u2013 45Ni-55Cu depende muito do procedimento de tratamento t\u00e9rmico, mas para liga recozida \u00e9 de cerca de 420 MPa.<\/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><span>Constantan<\/span><\/strong><span>\u00a0\u00e9 uma liga de cobre-n\u00edquel que consiste geralmente em 55% de cobre e 45% de n\u00edquel e pequenas quantidades espec\u00edficas de elementos adicionais para obter valores precisos (quase constantes) para o coeficiente de temperatura de\u00a0<\/span><strong><span>resistividade<\/span><\/strong><span>.\u00a0Ou seja, sua principal caracter\u00edstica \u00e9 a baixa varia\u00e7\u00e3o t\u00e9rmica de sua resistividade, que \u00e9 constante em uma ampla faixa de temperaturas.\u00a0Outras ligas com coeficientes de temperatura igualmente baixos s\u00e3o conhecidas, como a manganina.<\/span><\/p>\n<h2><span>For\u00e7a de Constantan \u2013 45Ni-55Cu<\/span><\/h2>\n<p><span>Na mec\u00e2nica dos materiais, a\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-strength-definition\/\"><strong><span>resist\u00eancia de um material<\/span><\/strong><\/a><span>\u00a0\u00e9 sua capacidade de suportar uma carga aplicada sem falha ou deforma\u00e7\u00e3o pl\u00e1stica.\u00a0<\/span><strong><span>A resist\u00eancia dos materiais<\/span><\/strong><span>\u00a0considera basicamente a rela\u00e7\u00e3o entre as\u00a0<\/span><strong><span>cargas externas aplicadas a um material e a\u00a0<\/span><\/strong><strong><span>deforma\u00e7\u00e3o<\/span><\/strong><span>\u00a0resultante\u00a0ou mudan\u00e7a nas dimens\u00f5es do material.\u00a0<\/span><strong><span>A resist\u00eancia de um material<\/span><\/strong><span>\u00a0\u00e9 sua capacidade de suportar essa carga aplicada sem falha ou deforma\u00e7\u00e3o pl\u00e1stica.<\/span><\/p>\n<h3><span>Resist\u00eancia \u00e0 tra\u00e7\u00e3o<\/span><\/h3>\n<p><span>A resist\u00eancia \u00e0 tra\u00e7\u00e3o final de constantan \u2013 45Ni-55Cu depende muito do procedimento de tratamento t\u00e9rmico, mas para liga recozida \u00e9 de cerca de 420 MPa.<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Yield-Strength-Ultimate-Tensile-Strength-Table-of-Materials.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-27807\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Yield-Strength-Ultimate-Tensile-Strength-Table-of-Materials-239x300.png\" alt=\"Resist\u00eancia ao escoamento - Resist\u00eancia \u00e0 tra\u00e7\u00e3o m\u00e1xima - Tabela de materiais\" width=\"239\" height=\"300\" \/><\/a><span>A\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/stress-strain-curve-stress-strain-diagram\/ultimate-tensile-strength-uts\/\"><strong><span>resist\u00eancia \u00e0 tra\u00e7\u00e3o final<\/span><\/strong><\/a><span>\u00a0\u00e9 o m\u00e1ximo na\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-stress-strain-curve-stress-strain-diagram-definition\/\"><span>curva de tens\u00e3o-deforma\u00e7\u00e3o<\/span><\/a><span> de engenharia.\u00a0Isso corresponde \u00e0\u00a0<\/span><strong><span>tens\u00e3o m\u00e1xima <\/span><\/strong><span>que pode ser sustentado por uma estrutura em tens\u00e3o.\u00a0A resist\u00eancia \u00e0 tra\u00e7\u00e3o final \u00e9 muitas vezes abreviada para \u201cresist\u00eancia \u00e0 tra\u00e7\u00e3o\u201d ou mesmo para \u201co m\u00e1ximo\u201d.\u00a0Se essa tens\u00e3o for aplicada e mantida, ocorrer\u00e1 fratura.\u00a0Freq\u00fcentemente, esse valor \u00e9 significativamente maior do que o limite de escoamento (at\u00e9 50 a 60 por cento a mais do que o rendimento de alguns tipos de metais).\u00a0Quando um material d\u00factil atinge sua resist\u00eancia m\u00e1xima, ele sofre estric\u00e7\u00e3o onde a \u00e1rea da se\u00e7\u00e3o transversal \u00e9 reduzida localmente.\u00a0A curva tens\u00e3o-deforma\u00e7\u00e3o n\u00e3o cont\u00e9m tens\u00e3o maior do que a resist\u00eancia m\u00e1xima.\u00a0Mesmo que as deforma\u00e7\u00f5es possam continuar a aumentar, a tens\u00e3o geralmente diminui ap\u00f3s o limite de resist\u00eancia ter sido alcan\u00e7ado.\u00a0\u00c9 uma propriedade intensiva;\u00a0portanto, seu valor n\u00e3o depende do tamanho do corpo de prova.\u00a0Por\u00e9m, depende de outros fatores, como o preparo do corpo de prova, <\/span><strong><span>temperatura<\/span><\/strong><span>\u00a0do ambiente de teste e do material.\u00a0<\/span><strong><span>A resist\u00eancia m\u00e1xima \u00e0 tra\u00e7\u00e3o<\/span><\/strong><span>\u00a0varia de 50 MPa para um alum\u00ednio at\u00e9 3000 MPa para a\u00e7os de alta resist\u00eancia.<\/span><\/p>\n<h3><span>For\u00e7a de Rendimento<\/span><\/h3>\n<p><span>A resist\u00eancia ao escoamento de constantan \u2013 45Ni-55Cu depende muito do procedimento de tratamento t\u00e9rmico, mas para liga recozida \u00e9 de cerca de 150 MPa.<\/span><\/p>\n<p><span>O\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/stress-strain-curve-stress-strain-diagram\/yield-strength-yield-point\/\"><strong><span>ponto de escoamento<\/span><\/strong><\/a><span>\u00a0\u00e9 o ponto em uma\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-stress-strain-curve-stress-strain-diagram-definition\/\"><span>curva tens\u00e3o-deforma\u00e7\u00e3o<\/span><\/a><span>\u00a0que indica o limite do comportamento el\u00e1stico e o in\u00edcio do comportamento pl\u00e1stico.\u00a0<\/span><strong><span>For\u00e7a de rendimento <\/span><\/strong><span>ou tens\u00e3o de escoamento \u00e9 a propriedade do material definida como a tens\u00e3o na qual um material come\u00e7a a se deformar plasticamente, enquanto o ponto de escoamento \u00e9 o ponto onde come\u00e7a a deforma\u00e7\u00e3o n\u00e3o linear (el\u00e1stica + pl\u00e1stica).\u00a0Antes do ponto de escoamento, o material se deformar\u00e1 elasticamente e retornar\u00e1 \u00e0 sua forma original quando a tens\u00e3o aplicada for removida.\u00a0Uma vez ultrapassado o ponto de escoamento, alguma fra\u00e7\u00e3o da deforma\u00e7\u00e3o ser\u00e1 permanente e irrevers\u00edvel.\u00a0Alguns a\u00e7os e outros materiais exibem um comportamento denominado fen\u00f4meno do ponto de escoamento.\u00a0As resist\u00eancias ao escoamento variam de 35 MPa para um alum\u00ednio de baixa resist\u00eancia a mais de 1400 MPa para a\u00e7os de resist\u00eancia muito alta.<\/span><\/p>\n<h3><span>M\u00f3dulo de elasticidade de Young<\/span><\/h3>\n<p><span>O m\u00f3dulo de elasticidade de Young de constantan \u2013 45Ni-55Cu \u00e9 de cerca de 162 GPa.<\/span><\/p>\n<p><span>O\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/hookes-law\/youngs-modulus-of-elasticity\/\"><span>m\u00f3dulo de elasticidade de Young<\/span><\/a><span>\u00a0\u00e9 o m\u00f3dulo de elasticidade para tens\u00e3o de tra\u00e7\u00e3o e compress\u00e3o no regime de elasticidade linear de uma deforma\u00e7\u00e3o uniaxial e geralmente \u00e9 avaliado por ensaios de tra\u00e7\u00e3o.\u00a0At\u00e9 uma tens\u00e3o limite, um corpo poder\u00e1 recuperar suas dimens\u00f5es com a retirada da carga.\u00a0As tens\u00f5es aplicadas fazem com que os \u00e1tomos em um cristal se movam de sua posi\u00e7\u00e3o de equil\u00edbrio.\u00a0Todos os\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/\"><span>\u00e1tomos<\/span><\/a><span>\u00a0s\u00e3o deslocados na mesma quantidade e ainda mant\u00eam sua geometria relativa.\u00a0Quando as tens\u00f5es s\u00e3o removidas, todos os \u00e1tomos retornam \u00e0s suas posi\u00e7\u00f5es originais e nenhuma deforma\u00e7\u00e3o permanente ocorre.\u00a0De acordo com a\u00a0<\/span><strong><a href=\"https:\/\/material-properties.org\/what-is-hookes-law-definition\/\"><span>lei de Hooke<\/span><\/a><span>,<\/span><\/strong><span>\u00a0a tens\u00e3o \u00e9 proporcional \u00e0 deforma\u00e7\u00e3o (na regi\u00e3o el\u00e1stica), e a inclina\u00e7\u00e3o \u00e9 o\u00a0<\/span><strong><span>m\u00f3dulo de Young<\/span><\/strong><span>.\u00a0O m\u00f3dulo de Young \u00e9 igual \u00e0 tens\u00e3o longitudinal dividida pela deforma\u00e7\u00e3o.<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Hookes-law-equation.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-27811\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Hookes-law-equation.png\" alt=\"\" width=\"320\" height=\"164\" \/><\/a><\/p>\n<h2><span>Dureza de Constantan \u2013 45Ni-55Cu<\/span><\/h2>\n<p><span>A dureza Rockwell de constantan \u2013 45Ni-55Cu \u00e9 de aproximadamente 50 HRB.<\/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>\u00a0\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>\u00a0<\/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 n\u00edquel<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/metals-what-are-metals\/alloys-composition-properties-of-metal-alloys\/nickel-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>For\u00e7a e Dureza de Constantan \u2013 45Ni-55Cu<\/span><\/strong><span>, ajude voc\u00ea.\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,\u00a0For\u00e7a e Dureza de Constantan \u2013 45Ni-55Cu, ajude voc\u00ea.\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 resist\u00eancia e dureza de Constantan \u2013 45Ni-55Cu - Defini\u00e7\u00e3o | Propriedades do material<\/title>\n<meta name=\"description\" content=\"For\u00e7a e Dureza de Constantan \u2013 45Ni-55Cu. 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