Selective dissolution of nanolamellar Ti–41 at.% Al alloy single crystals / Yuichiro Koizumi in Acta materialia, Vol. 58 N° 8 (Mai 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 2876–2886 Titre : Selective dissolution of nanolamellar Ti–41 at.% Al alloy single crystals Type de document : texte imprimé Auteurs : Yuichiro Koizumi, Auteur ; Atsushi Sugihara, Auteur ; Hiroaki Tsuchiya, Auteur Année de publication : 2011 Article en page(s) : pp. 2876–2886 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Titanium aluminides Multilayers Nanostructure Corrosion Electrochemistry Résumé : The selective dissolution behavior of Ti–41 at.% Al single crystals having a α2/γ-lamellar structure with a lamellar thickness in the range 20 nm to 1 μm have been investigated in 0.5 M NaCl aqueous solution focusing on the effect of lamellar thickness on the dissolution of γ-lamellae. In the case where γ-lamellae were thicker than ∼100 nm on average, γ-lamellae were selectively dissolved and, as a result, crevasses whose widths were close to the γ-lamellae thicknesses were formed. However, not all γ-lamellae were dissolved and the distribution of crevasses was much less uniform compared with that of the γ-lamellae. On the other hand, when the average γ-lamellae thickness was DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000303 [article] Selective dissolution of nanolamellar Ti–41 at.% Al alloy single crystals [texte imprimé] / Yuichiro Koizumi, Auteur ; Atsushi Sugihara, Auteur ; Hiroaki Tsuchiya, Auteur . - 2011 . - pp. 2876–2886. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 2876–2886 Mots-clés : Titanium aluminides Multilayers Nanostructure Corrosion Electrochemistry Résumé : The selective dissolution behavior of Ti–41 at.% Al single crystals having a α2/γ-lamellar structure with a lamellar thickness in the range 20 nm to 1 μm have been investigated in 0.5 M NaCl aqueous solution focusing on the effect of lamellar thickness on the dissolution of γ-lamellae. In the case where γ-lamellae were thicker than ∼100 nm on average, γ-lamellae were selectively dissolved and, as a result, crevasses whose widths were close to the γ-lamellae thicknesses were formed. However, not all γ-lamellae were dissolved and the distribution of crevasses was much less uniform compared with that of the γ-lamellae. On the other hand, when the average γ-lamellae thickness was DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000303

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