Three-dimensional characterization of micron second-phases and recrystallized structure in 5083 aluminum alloy

Xiaolei HAN; Cong CHE; Zhiwei DU; Guojun WANG; Liying LU; Rongguang JIA; Yonggang PENG

doi:10.11868/j.issn.1001-4381.2023.000321

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (4) : 98-106. DOI: 10.11868/j.issn.1001-4381.2023.000321

RESEARCH ARTICLE

Three-dimensional characterization of micron second-phases and recrystallized structure in 5083 aluminum alloy

Xiaolei HAN ¹^,² ,
Cong CHE ¹^,² ,
Zhiwei DU ¹^,² ,
Guojun WANG ³ ,
Liying LU ⁴ ,
Rongguang JIA ¹^,² ,
Yonggang PENG ¹^,²

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Abstract

The micro-sized second-phase and recrystallized structure has an important influence on the strength and toughness of 5083-O alloy. In order to acquire the morphological feature of the micro-sized second-phase particles and recrystallized particles in 5083-O alloy， multi-slices EDS data at a low acceleration voltage of 5 kV and EBSD data at 20 kV of the alloy are collected based on the double beam microscope system. These multi-slices data are restructured into three-dimensional types by Avizo software. The size， morphology， distribution， and volume fraction of the chief second-phases （Mg₂Si phase and Fe-rich phase） and recrystallized structure are obtained through the restructured data. The results show that the volume fractions of Mg₂Si phases， Fe-rich phases， and recrystallized particles in the studied alloy are 0.46%，0.25%， and 11.7%， respectively. Most Mg₂Si particles have smooth surfaces， with shapes of near-spherical， near-ellipsoid， or rod-shaped， and elongate along the rolling direction. The Fe-rich phases in the alloy are angular or subangular， and have relatively low spherical degrees. The three-dimensional EBSD restructure data show that the smaller size recrystallized particles have the higher spherical degrees， and the bigger size recrystallized particles have the lower spherical degrees. It is found that the recrystallized grains grow up from the small sphere recrystallized particles during the annealing process， and grow fastest along the rolling direction. The morphology of recrystallized particles is more truly reflected by three-dimensional EBSD results.

Key words

5083 aluminum alloy / three-dimensional reconstruction / second-phase / recrystallization / EBSD

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Xiaolei HAN , Cong CHE , Zhiwei DU , et al . Three-dimensional characterization of micron second-phases and recrystallized structure in 5083 aluminum alloy. Journal of Materials Engineering. 2025, 53(4): 98-106 https://doi.org/10.11868/j.issn.1001-4381.2023.000321

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Received	Revised	Published
21 Mar 2023	29 Dec 2024	20 Apr 2025
Issue Date
18 Jun 2025

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