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Dislocation drag at the nanoscale / Christopher R. Weinberger in Acta materialia, Vol. 58 N° 19 (Novembre 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6535–6541 Titre : Dislocation drag at the nanoscale Type de document : texte imprimé Auteurs : Christopher R. Weinberger, Auteur Année de publication : 2011 Article en page(s) : pp. 6535–6541 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Dislocation  mobility  Nanostructure  Plastic  deformation Résumé : The mobility of dislocations is shown to be a size-dependent phenomenon. When dislocations intersect free surfaces, the mobility decreases as the dislocation length decreases, suggesting that dislocation motion in small structures may be more difficult. This increased drag may be related to surface forces acting where the dislocation intersects the free surface or from altered dislocation–phonon interactions. Mobility, however, is not as dependent on the film thickness and converges rapidly to bulk values. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005318 [article] Dislocation drag at the nanoscale [texte imprimé] / Christopher R. Weinberger, Auteur . - 2011 . - pp. 6535–6541. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6535–6541 Mots-clés : Dislocation  mobility  Nanostructure  Plastic  deformation Résumé : The mobility of dislocations is shown to be a size-dependent phenomenon. When dislocations intersect free surfaces, the mobility decreases as the dislocation length decreases, suggesting that dislocation motion in small structures may be more difficult. This increased drag may be related to surface forces acting where the dislocation intersects the free surface or from altered dislocation–phonon interactions. Mobility, however, is not as dependent on the film thickness and converges rapidly to bulk values. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005318