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

页码：627 / 633

页数：7

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