The effect of microalloying additions of Au on the natural ageing of Al–Cu / B. Klobes in Acta materialia, Vol. 58 N° 19 (Novembre 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6379–6384 Titre : The effect of microalloying additions of Au on the natural ageing of Al–Cu Type de document : texte imprimé Auteurs : B. Klobes, Auteur ; O. Balarisi, Auteur ; M. Liu, Auteur Année de publication : 2011 Article en page(s) : pp. 6379–6384 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Aluminium alloys Al–Cu–Au Ageing Positron annihilation XANES Résumé : The influence of microalloying additions of Au to the binary Al–Cu system is investigated utilizing hardness measurements, positron annihilation spectroscopy and X-ray absorption spectroscopy. No room temperature ageing could be observed in the case of the ternary Al–Cu–Au alloy. Instead, quenched-in vacancies were trapped by Au atoms and thus could not catalyse the decomposition of the alloy. However, artificial ageing dissolves the complexes of Au and vacancies. A comparison between experimental and calculated absorption spectra shows that Au atoms did not agglomerate significantly during either natural or artificial ageing. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005033 [article] The effect of microalloying additions of Au on the natural ageing of Al–Cu [texte imprimé] / B. Klobes, Auteur ; O. Balarisi, Auteur ; M. Liu, Auteur . - 2011 . - pp. 6379–6384. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6379–6384 Mots-clés : Aluminium alloys Al–Cu–Au Ageing Positron annihilation XANES Résumé : The influence of microalloying additions of Au to the binary Al–Cu system is investigated utilizing hardness measurements, positron annihilation spectroscopy and X-ray absorption spectroscopy. No room temperature ageing could be observed in the case of the ternary Al–Cu–Au alloy. Instead, quenched-in vacancies were trapped by Au atoms and thus could not catalyse the decomposition of the alloy. However, artificial ageing dissolves the complexes of Au and vacancies. A comparison between experimental and calculated absorption spectra shows that Au atoms did not agglomerate significantly during either natural or artificial ageing. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005033

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