Texture Evolution and In Situ Investigation of Recrystallization Behavior in a Hot-Rolled Al-Zn-Mg-Cu-Zr Alloy
Peng Xia, Kedu Lin, Yiwen Hu, Jianfei Hao, Runxia Li, Huilan Huang
TL;DR
This study examines how different homogenization treatments affect the texture and recrystallization behavior in a specific aluminum alloy during hot rolling.
Contribution
The novel contribution is the in situ investigation of how Al3Zr precipitates modulate recrystallization behavior in hot-rolled Al-Zn-Mg-Cu-Zr alloys.
Findings
Double-stage homogenized alloy showed suppressed recrystallization due to higher Al3Zr precipitate density.
Single-stage homogenized alloy exhibited extensive recrystallization peaking at 78.1%.
Brass-oriented grains transformed into cube-oriented grains during recrystallization.
Abstract
By means of characterization techniques such as XRD, TEM, and in situ EBSD, the texture evolution, recrystallization behavior, and their modulation by the Al3Zr phase in hot-rolled Al-Zn-Mg-Cu-Zr alloys with varied homogenization treatments were investigated. Results show that both the single-stage homogenized (SH) alloy and the double-stage homogenized (DH) alloy acquired a typical β-fiber texture after hot rolling, including brass, S, and copper orientations. The DH alloy experienced suppressed recrystallization (a recrystallization fraction of 6.05%) owing to its higher density of Al3Zr precipitates. In contrast, the SH alloy exhibited more significant dissolution and agglomeration of Al3Zr, leading to extensive recrystallization peaking at 78.1%. The primary recrystallization mode was identified as continuous recrystallization, characterized by the growth and coarsening of…
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Taxonomy
TopicsAluminum Alloy Microstructure Properties · Microstructure and mechanical properties · Metallurgy and Material Forming