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Mechanical behaviour of nanoporous superalloy membranes / J. Rösler in Acta materialia, Vol. 58 N° 5 (Mars 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 5 (Mars 2010) . - pp. 1815–1828 Titre : Mechanical behaviour of nanoporous superalloy membranes Type de document : texte imprimé Auteurs : J. Rösler, Auteur ; O. Näth, Auteur Année de publication : 2011 Article en page(s) : pp. 1815–1828 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Nanostructure  Cellular  materials  Nickel  alloys  Elastic  behaviour  Fracture Résumé : The mechanical behaviour of nanoporous superalloy membranes is analysed for the first time and discussed in conjunction with their microstructure, consisting of ligaments of the γ′ phase and channel-like pores a few hundred nanometers wide. Tensile tests and vibrating reed experiments are performed to determine the mechanical properties. It is shown that they are strongly dependent on the processing procedure, the orientation of the γ′ ligaments and interdendritic heterogeneities. A microstructural model of the membrane materials is then used to analyse the findings in more detail and rationalize the observed elastic behaviour. Following these results, unique metallic membrane materials can be produced, combining excellent strength on a macroscopic scale with extremely fine porosity on a microscopic scale. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008039 [article] Mechanical behaviour of nanoporous superalloy membranes [texte imprimé] / J. Rösler, Auteur ; O. Näth, Auteur . - 2011 . - pp. 1815–1828. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 5 (Mars 2010) . - pp. 1815–1828 Mots-clés : Nanostructure  Cellular  materials  Nickel  alloys  Elastic  behaviour  Fracture Résumé : The mechanical behaviour of nanoporous superalloy membranes is analysed for the first time and discussed in conjunction with their microstructure, consisting of ligaments of the γ′ phase and channel-like pores a few hundred nanometers wide. Tensile tests and vibrating reed experiments are performed to determine the mechanical properties. It is shown that they are strongly dependent on the processing procedure, the orientation of the γ′ ligaments and interdendritic heterogeneities. A microstructural model of the membrane materials is then used to analyse the findings in more detail and rationalize the observed elastic behaviour. Following these results, unique metallic membrane materials can be produced, combining excellent strength on a macroscopic scale with extremely fine porosity on a microscopic scale. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008039