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Erschienen in: Metallurgical and Materials Transactions A 4/2014

01.04.2014

Effect of Scandium on the Interaction of Concurrent Precipitation and Recrystallization in Commercial AA3003 Aluminum Alloy

verfasst von: Yiyou Tu, Huan Qian, Xuefeng Zhou, Jianqing Jiang

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 4/2014

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Abstract

In the current study, the effect of Sc addition on the interaction of concurrent precipitation and recrystallization in commercial AA3003 aluminum alloy was investigated using optical microscopy, scanning electron microscopy, and transmission electron microscopy. In case of AA3003 alloy, which was cold rolled to a true strain of 2.20 and heated at a heating rate of 150 K/s, the onset of precipitation and ending of recrystallization are signified by the critical temperature, T C ~740 K (467 °C). There is a change in the shape of the recrystallized grains from pancake-like to equiaxed shape, as the annealing temperature increases greater than T C. In case of AA3003 alloy microalloyed with 0.4 wt pct of Sc, the high no. density precipitation of coherent Al3Sc precipitates always occurs before recrystallization because of the small nucleation barrier and high rate of decomposition. This leads to extremely coarse pancake-like recrystallization grains with high fraction of low-angle grain boundaries in the entire annealing temperature range, even at a high brazing temperature of 883 K (610 °C).

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Metadaten
Titel
Effect of Scandium on the Interaction of Concurrent Precipitation and Recrystallization in Commercial AA3003 Aluminum Alloy
verfasst von
Yiyou Tu
Huan Qian
Xuefeng Zhou
Jianqing Jiang
Publikationsdatum
01.04.2014
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 4/2014
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-013-2136-6

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