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

作     者：Michaela Slapákova POKOVA Mariia ZIMINA Miroslav CIESLAR Michaela ?lapáková POKOVá;Mariia ZIMINA;Miroslav CIESLAR

作者机构：Faculty of Mathematics and PhysicsCharles University in PragueKe Karlovu 5121 16 Prague 2Czech Republic 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2016年第26卷第3期

页      面：627-633页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：The financial supports of grants GACR P107-12-0921 and SVV-2015-260213 

主　　题：aluminum alloy Al_(3)Zr α-Al(Mn,Fe)Si pre-annealing recovery recrystallization microstructure evolution 

摘      要：An AA3003 aluminum alloy prepared by twin-roll casting was modified by a small amount of zirconium. Annealing at 450 °C led to precipitation of coherent Al3Zr phase and a simultaneous co-precipitation of Mn-richα-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 ofα-Al(Mn,Fe)Si particles preceded recrystallization at 450 °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.