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Ex situ TEM observation of localized attack on AA 6061 / D. M. Sun in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 105–110 Titre : Ex situ TEM observation of localized attack on AA 6061 Type de document : texte imprimé Auteurs : D. M. Sun, Auteur ; Y. M. Jiang, Auteur ; Q. W. Xiang, Auteur Année de publication : 2010 Article en page(s) : pp. 105–110 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Aluminum  alloy  6061;  localized  corrosion;  transmission  electron  microscopy Résumé : Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg2Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found to relate the dissolution of the heterogeneous phases. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905267/abstract [article] Ex situ TEM observation of localized attack on AA 6061 [texte imprimé] / D. M. Sun, Auteur ; Y. M. Jiang, Auteur ; Q. W. Xiang, Auteur . - 2010 . - pp. 105–110. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 105–110 Mots-clés : Aluminum  alloy  6061;  localized  corrosion;  transmission  electron  microscopy Résumé : Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg2Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found to relate the dissolution of the heterogeneous phases. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905267/abstract