Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1571052 | Materials Characterization | 2014 | 9 Pages |
Abstract
The effects of different V contents (0.01 to 0.19Â wt.%) on the recrystallization resistance of 7150 aluminum alloys during post-deformation heat treatment were investigated. The microstructural evolutions at as-cast, as-homogenized conditions and after post-deformation annealing were studied using optical, scanning electron and transmission electron microscopes and using the electron backscattered diffraction technique. The precipitation of Al21V2 dispersoids was observed in alloys containing 0.11 to 0.19Â wt.%Â V after homogenization. The dispersoids were mainly distributed in the dendrite cells, and the precipitate-free zones occurred in the interdendritic regions and near grain boundaries. V addition could significantly enhance the recrystallization resistance during post-deformation annealing, particularly in the presence of a great number of Al21V2 dispersoids. Recrystallized grain growth was effectively restricted because of the dispersoid pinning effect. The alloy containing 0.15Â wt.%Â V exhibited the highest recrystallization resistance amongst all V-containing alloys studied.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jing Lai, Cangji Shi, X.-Grant Chen,