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Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys / Z. Ahmad in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 335–345 Titre : Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys Type de document : texte imprimé Auteurs : Z. Ahmad, Auteur ; B. J. Abdul Aleem, Auteur Année de publication : 2011 Article en page(s) : pp. 335–345 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Al-Mg  alloys  Electrochemical  corrosion  Strengthening  Nano-precipitates  Scandium  Grain  boundary  precipitates Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Microanalytical, mechanical, and corrosion studies were undertaken to investigate the effect of nano-precipitates of Al(Scx−1Zrx) on the mechanical and corrosion characteristics of Al 2.5 alloy containing 0, 0.15, 0.3, 0.6, and 0.9 wt% of Sc with 0.15 wt% Zr. Addition of 0.3% Sc significantly increased the yield strength due to small precipitates sizes (5–19 nm) and the high coherency of the nano-particles. Largest contributor to the strength was grain boundary strengthening caused by pinning of grain boundary precipitates. The alloys showed a good resistance to corrosion in 3.5 wt% neutral chloride solution. The alloy offered a high passivation tendency because of homogeneous coherent nano Al(Scx−1Zrx) precipitates. The nano precipitates interfaces and homogeneously distributed Al3Sc precipitates offer a high degree of corrosion resistance to Al 2.5 Mg Sc alloys compared to conventional aluminum alloys, such as Al 6061 and Al6013. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905342/abstract [article] Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys [texte imprimé] / Z. Ahmad, Auteur ; B. J. Abdul Aleem, Auteur . - 2011 . - pp. 335–345. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 335–345 Mots-clés : Al-Mg  alloys  Electrochemical  corrosion  Strengthening  Nano-precipitates  Scandium  Grain  boundary  precipitates Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Microanalytical, mechanical, and corrosion studies were undertaken to investigate the effect of nano-precipitates of Al(Scx−1Zrx) on the mechanical and corrosion characteristics of Al 2.5 alloy containing 0, 0.15, 0.3, 0.6, and 0.9 wt% of Sc with 0.15 wt% Zr. Addition of 0.3% Sc significantly increased the yield strength due to small precipitates sizes (5–19 nm) and the high coherency of the nano-particles. Largest contributor to the strength was grain boundary strengthening caused by pinning of grain boundary precipitates. The alloys showed a good resistance to corrosion in 3.5 wt% neutral chloride solution. The alloy offered a high passivation tendency because of homogeneous coherent nano Al(Scx−1Zrx) precipitates. The nano precipitates interfaces and homogeneously distributed Al3Sc precipitates offer a high degree of corrosion resistance to Al 2.5 Mg Sc alloys compared to conventional aluminum alloys, such as Al 6061 and Al6013. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905342/abstract