Structural transformations in continuously cast Al–Mg alloys

Four continuously cast Al–Mg alloys were cold rolled and annealed by slow heating from room temperature (RT) to 500 °C. The influence of solute elements (Mg, Mn, Fe, Si and Cr) on recovery, recrystallization and precipitation was studied by electrical resistivity measurements, light and transmission...

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Bibliographic Details
Published in:Journal of alloys and compounds 2004-09, Vol.378 (1), p.316-321
Main Authors: JANECEK, Milos, SLAMOVA, Margarita, HAJEK, Michal
Format: Article
Language:English
Subjects:
Casting
Cross-disciplinary physics: materials science
rheology
Dislocations and disclinations
Exact sciences and technology
Materials science
Physics
Precipitation
Scanning and transmission electron microscopy
Treatment of materials and its effects on microstructure and properties
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Summary:Four continuously cast Al–Mg alloys were cold rolled and annealed by slow heating from room temperature (RT) to 500 °C. The influence of solute elements (Mg, Mn, Fe, Si and Cr) on recovery, recrystallization and precipitation was studied by electrical resistivity measurements, light and transmission electron microscopy (TEM) and X-ray analysis. TEM observations proved that deformation recovery occurs during cold rolling and is strongly influenced by the amount of solute atoms, particularly Mg. The most intensive electrical resistivity changes were observed at temperatures above 400 °C. TEM examinations indicated that they correspond to precipitation. Solute atoms, namely Mn, Fe, Si and Cr, significantly hinder recrystallization. Precipitation of non-coherent precipitates occurs upon annealing. The presence of Mn, Fe and Si was detected in the fine precipitates by EDAX X-ray analysis.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2003.10.081