{"id":116269,"date":"2022-05-11T14:19:02","date_gmt":"2022-05-11T13:19:02","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-quun-superalliage-a-base-de-cobalt-definition\/"},"modified":"2022-05-18T08:02:22","modified_gmt":"2022-05-18T07:02:22","slug":"quest-ce-quun-superalliage-a-base-de-cobalt-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-quun-superalliage-a-base-de-cobalt-definition\/","title":{"rendered":"Qu’est-ce qu’un superalliage \u00e0 base de cobalt – D\u00e9finition"},"content":{"rendered":"

Les superalliages \u00e0 base de cobalt se caract\u00e9risent par une matrice aust\u00e9nitique renforc\u00e9e en solution solide (fcc) dans laquelle une faible quantit\u00e9 de carbure est distribu\u00e9e.<\/div><\/div><\/span><\/p>\n

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Les superalliages<\/span><\/strong>, ou\u00a0<\/span>alliages hautes performances<\/span><\/strong>, sont des alliages non ferreux qui pr\u00e9sentent une\u00a0<\/span>r\u00e9sistance<\/span><\/a>\u00a0et une stabilit\u00e9 de surface exceptionnelles\u00a0<\/span>\u00e0 haute temp\u00e9rature<\/span><\/strong>.\u00a0Leur capacit\u00e9 \u00e0 fonctionner en toute s\u00e9curit\u00e9 \u00e0 une fraction \u00e9lev\u00e9e de leur point de fusion (jusqu’\u00e0 85 % de leurs points de fusion (T<\/span>m<\/span><\/sub>) exprim\u00e9s en degr\u00e9s Kelvin, 0,85) est leur principale caract\u00e9ristique.\u00a0<\/span>Les superalliages<\/span><\/strong> sont g\u00e9n\u00e9ralement utilis\u00e9s \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 540 \u00b0C (1000 \u00b0F), car \u00e0 ces temp\u00e9ratures, les alliages d’acier et de titane ordinaires perdent leurs forces, la corrosion est \u00e9galement courante dans les aciers \u00e0 cette temp\u00e9rature. A haute temp\u00e9rature, les superalliages conservent leur r\u00e9sistance m\u00e9canique, leur r\u00e9sistance au\u00a0<\/span>fluage thermique<\/span><\/strong><\/a> d\u00e9formation, stabilit\u00e9 de surface et r\u00e9sistance \u00e0 la corrosion ou \u00e0 l’oxydation.\u00a0Certains superalliages \u00e0 base de nickel peuvent r\u00e9sister \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 1200 \u00b0C, selon la composition de l’alliage. Les superalliages sont souvent coul\u00e9s sous forme de monocristal, tandis que les joints de grains peuvent fournir de la r\u00e9sistance, ils diminuent la r\u00e9sistance au fluage.<\/span><\/p>\n

Superalliages \u00e0 base de cobalt<\/span><\/h2>\n

Cette classe d’alliages est relativement nouvelle.\u00a0En 2006, Sato et al.\u00a0d\u00e9couvert une nouvelle phase dans le syst\u00e8me Co\u2013Al\u2013W.\u00a0Contrairement aux autres superalliages, les alliages \u00e0 base de cobalt se caract\u00e9risent par une matrice aust\u00e9nitique renforc\u00e9e en solution solide (fcc) dans laquelle une faible quantit\u00e9 de carbure est distribu\u00e9e.\u00a0Bien qu’ils ne soient pas utilis\u00e9s commercialement dans la mesure des superalliages \u00e0 base de Ni, les \u00e9l\u00e9ments d’alliage trouv\u00e9s dans les alliages \u00e0 base de Co de recherche sont C, Cr, W, Ni, Ti, Al, Ir et Ta.\u00a0Ils poss\u00e8dent une meilleure soudabilit\u00e9 et une meilleure r\u00e9sistance \u00e0 la fatigue thermique par rapport \u00e0 l’alliage \u00e0 base de nickel.\u00a0De plus, ils ont une excellente r\u00e9sistance \u00e0 la corrosion \u00e0 haute temp\u00e9rature (980-1100 \u00b0C) en raison de leur teneur en chrome plus \u00e9lev\u00e9e.<\/span><\/p>\n

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<\/span>R\u00e9f\u00e9rences :<\/div>
Science des mat\u00e9riaux:<\/div><\/div><\/div><\/span><\/p>\n

D\u00e9partement am\u00e9ricain de l’\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 and 2. Janvier 1993.<\/span>
\nUS Department of Energy, Material Science.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span>
\nWilliam 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>
\nEn 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>
\nGaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span>
\nGonz\u00e1lez-Vi\u00f1as, W. & Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1.<\/span>
\nAshby, 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>
\nJR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span>
\n<\/span><\/p><\/div><\/div>

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Voir ci-dessus:<\/span>
\nSuperalliages\"\" <\/span><\/a><\/span><\/p><\/div><\/div>

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Nous esp\u00e9rons que cet article,\u00a0<\/span>Superalliage \u00e0 base de cobalt<\/span><\/strong>, vous aidera.\u00a0Si oui,\u00a0<\/span>donnez-nous un like<\/span><\/strong>\u00a0dans la barre lat\u00e9rale.\u00a0L’objectif principal de ce site Web est d’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":"

Nous esp\u00e9rons que cet article,\u00a0Superalliage \u00e0 base de cobalt, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L’objectif principal de ce site Web est d’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":"\nQu'est-ce qu'un superalliage \u00e0 base de cobalt - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"Les superalliages \u00e0 base de cobalt se caract\u00e9risent par une matrice aust\u00e9nitique renforc\u00e9e en solution solide (fcc) dans laquelle une faible quantit\u00e9 de carbure est distribu\u00e9e.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/material-properties.org\/fr\/quest-ce-quun-superalliage-a-base-de-cobalt-definition\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu'est-ce qu'un superalliage \u00e0 base de cobalt - 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