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Thermal stability of nanocomposite metals / J. B. Dubois in Acta materialia, Vol. 58 N° 19 (Novembre 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6504–6512 Titre : Thermal stability of nanocomposite metals : In situ observation of anomalous residual stress relaxation during annealing under synchrotron radiation Type de document : texte imprimé Auteurs : J. B. Dubois, Auteur ; L. Thilly, Auteur ; P.O. Renault, Auteur Année de publication : 2011 Article en page(s) : pp. 6504–6512 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Nanostructures  In  situ  annealing  Residual  stresses  X-ray  diffraction  Synchrotron Résumé : The thermal stability of nanocomposite metals (a nanostructured copper matrix embedding niobium nanotubes) is investigated via time-resolved in situ annealing under synchrotron high-energy X-rays. The diffraction peak profile analysis demonstrates that internal-stress relaxation begins in the Nb nanotubes at a temperature far below the bulk recrystallization temperature and follows size-specific regimes originating from a proximity effect with the nanostructured Cu matrix: the increased Cu–Nb interface surface disrupts internal-stress relaxation processes, confirming the larger thermal resistance of nanostructured materials. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005276 [article] Thermal stability of nanocomposite metals : In situ observation of anomalous residual stress relaxation during annealing under synchrotron radiation [texte imprimé] / J. B. Dubois, Auteur ; L. Thilly, Auteur ; P.O. Renault, Auteur . - 2011 . - pp. 6504–6512. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6504–6512 Mots-clés : Nanostructures  In  situ  annealing  Residual  stresses  X-ray  diffraction  Synchrotron Résumé : The thermal stability of nanocomposite metals (a nanostructured copper matrix embedding niobium nanotubes) is investigated via time-resolved in situ annealing under synchrotron high-energy X-rays. The diffraction peak profile analysis demonstrates that internal-stress relaxation begins in the Nb nanotubes at a temperature far below the bulk recrystallization temperature and follows size-specific regimes originating from a proximity effect with the nanostructured Cu matrix: the increased Cu–Nb interface surface disrupts internal-stress relaxation processes, confirming the larger thermal resistance of nanostructured materials. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005276