Effect of pre-annealing on microstructure evolution of TRC AA3003 aluminum alloy subjected to ECAP

被引：14
作者：
Pokova, Michaela [1 ]
Zimina, Mariia [1 ]
Cieslar, Miroslav [1 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Ke Karlovu 5, CR-12116 Prague, Czech Republic
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 03期
关键词：
aluminum alloy; Al3Zr; alpha-Al(Mn; Fe)Si; pre-annealing; recovery; recrystallization; microstructure evolution; MECHANICAL-PROPERTIES; STRENGTHENING MECHANISMS; AL-ALLOYS; MN ALLOY; FE; SI; RECRYSTALLIZATION; DISPERSOIDS; STRIP;
D O I：
10.1016/S1003-6326(16)64151-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
An AA3003 aluminum alloy prepared by twin-roll casting was modified by a small amount of zirconium. Annealing at 450 degrees C led to precipitation of coherent Al3Zr phase and a simultaneous co-precipitation of Mn-rich alpha-Al(Mn, Fe)Si phase. Severe plastic deformation by equal channel angular pressing resulted in the grain refinement and increase of microhardness. Observation by electron back-scatter diffraction and in-situ transmission electron microscopy revealed influence of pre-annealing on microstructure changes during post-deformation heat treatment. Dislocation recovery and precipitation of alpha-Al(Mn, Fe)Si particles preceded recrystallization at 450 degrees C in material which was not annealed before deformation. The pre-deformation annealing enabled dynamic recovery during deformation as it depleted the solid solution from Mn atoms. Recrystallization was enhanced by Al3Zr precipitates.
引用
收藏
页码：627 / 633
页数：7
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