Distribution characterization of boundary misorientation angle of 7050 aluminum alloy after high-temperature compression

被引：47

作者：

Zhen, Liang ^{[1
]}

Hu, Huie ^{[1
]}

Wang, Xin-yun ^{[2
]}

Zhang, Baoyou ^{[1
]}

Shao, Wenzhu ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2009年 / 209卷 / 02期

关键词：

Misorientation angle; Grain boundary; EBSD; Compression; Softening; ELECTRON BACKSCATTER DIFFRACTION; DYNAMIC RECRYSTALLIZATION; DEFORMATION; BEHAVIOR; MECHANISM; STRAIN; GRAIN;

D O I：

10.1016/j.jmatprotec.2008.02.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compression tests of 7050 aluminum alloy have been conducted at different temperatures (340, 380, 420, and 460 degrees C) and different strain rates of 0.1, 1, 10, and 100 s(-1). The microstructure characteristics of the alloy after deformation are investigated using OM, electron backscatter diffraction (EBSD) technique and TEM. Results show that the volume fraction of recrystallized grains and the average misorientation angle increase with the increase of deformation temperature with the strain rate of 0.1 s(-1). When the 7050 aluminum alloys were deformed at 460 degrees C, the volume fraction of recrystallized grains and average misorientation angle decrease with increasing strain rate. The primary softening mechanism of the 7050 aluminum alloy deformed at 340, 380, and 420 degrees C with the strain rate of 0.1 s(-1) is dynamic recovery. Dynamic recrystallization is the main softening mechanism of the alloy deformed at 460 degrees C and different strain rates. The softening mechanism of the alloy is not sensitive to strain rate. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：754 / 761

页数：8

共 19 条

[1] EBSD FEG-SEM, TEM and XRD techniques applied to grain study of a commercially pure 1200 aluminum subjected to equal-channel angular-pressing [J].

Cabibbo, A ;

Evangelista, E ;

Scalabroni, C .

MICRON, 2005, 36 (05) :401-414

[2] Annealing behavior of aluminium deformed by equal channel angular pressing [J].

Cao, WQ ;

Godfrey, A ;

Liu, W ;

Liu, Q .

MATERIALS LETTERS, 2003, 57 (24-25) :3767-3774

[3]

Eschamps AD, 1998, MAT SCI ENG A-STRUCT, V251, P200

[4] Dynamic recrystallization in AZ31 magnesium alloy [J].

Fatemi-Varzaneh, S. M. ;

Zarei-Hanzaki, A. ;

Beladi, H. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 456 (1-2) :52-57

[5] An experimental study of the recrystallization mechanism during hot deformation of aluminium [J].

Gourdet, S ;

Montheillet, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 283 (1-2) :274-288

[6] Microstructural evolution of Fe-32%Ni alloy during large strain multi-axial forging [J].

Han, Baojun ;

Xu, Zhou .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 447 (1-2) :119-124

[7] Orientation rotation behavior during in situ tensile deformation of polycrystalline 1050 aluminum alloy [J].

Han, JH ;

Jee, KK ;

Oh, KH .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2003, 45 (10) :1613-1623

[8] Experimental prediction of deformation mechanism after continuous dynamic recrystallization in superplastic P/M7475 [J].

Hirata, T ;

Mukai, T ;

Saito, N ;

Tanabe, S ;

Kohzu, M ;

Higashi, K .

JOURNAL OF MATERIALS SCIENCE, 2003, 38 (19) :3925-3932

[9]

HU HE, MAT SCI E A IN PRESS

[10]

HU HE, MAT SCI TEC IN PRESS

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