Quantitative analysis of precipitation in an Al–Zn–Mg–Cu–Li alloy

The precipitate size distribution and morphology in an Al–Zn–Mg–Cu–Li alloy have been studied by small angle X-ray scattering (SAXS). The results show that the precipitates belong to flat ellipsoids of revolution and their axis ratio range is between 0.2 and 0.4 aged at different conditions. To veri...

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Veröffentlicht in:	Materials characterization 2005-07, Vol.55 (1), p.75-82
Hauptverfasser:	Du, Z.W., Zhou, T.T., Chen, C.Q., Liu, P.Y., Dong, B.Z.
Format:	Artikel
Sprache:	eng
Schlagworte:	Al–Zn–Mg–Cu–Li alloys Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Morphology Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Precipitates Size distribution Small angle X-ray scattering Solidification
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Beschreibung
Zusammenfassung:	The precipitate size distribution and morphology in an Al–Zn–Mg–Cu–Li alloy have been studied by small angle X-ray scattering (SAXS). The results show that the precipitates belong to flat ellipsoids of revolution and their axis ratio range is between 0.2 and 0.4 aged at different conditions. To verify the validity, the results of SAXS have been compared with that of TEM. This study has also constructed the logarithm Gaussian distribution of effective size and the Maxwell distribution of particles mass with gyration radius by means of a prior assumed model of the size distribution. The geometric mean and distribution width for both type distribution curves increase with kinetic strength K s, which indicates the characteristics of the size distribution in space during aging.
ISSN:	1044-5803 1873-4189
DOI:	10.1016/j.matchar.2005.03.001