Effect of Si Content on Dynamic Recrystallization of Al-Si-Mg Alloys During Hot Extrusion

doi:10.1016/j.jmst.2014.07.011

Abstract

Abstract: By using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM), the effect of Si content on microstructure characteristics of three as-extruded Al-Si-Mg alloys was investigated. Results showed that the density of coarse Si particles played a critical role in dynamic recrystallization. Dynamic recrystallization rarely occurred in S1 alloy with less Si content; however, it happened in the Si-rich zones in S2 alloy with a medium Si content. And a mature recrystallization was observed in S3 alloy with high Si content. Although deformation was carried out at high temperature, particle-stimulated dynamic recrystallization occurred in Si-rich zones.

Key words: Al-Si-Mg alloys, Electron backscatter diffraction (EBSD), Transmission electron microscopy (TEM), Dynamic recrystallization, Hot extrusion

Yuna Wu, Hengcheng Liao, Jian Yang, Kexin Zhou. Effect of Si Content on Dynamic Recrystallization of Al-Si-Mg Alloys During Hot Extrusion[J]. J. Mater. Sci. Technol., 2014, 30(12): 1271-1277.

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