Strain-induced nano recrystallization in AZ31 magnesium: TEM characterization

被引：10

作者：

Fatemi, S. M. ^{[1
]}

Zarei-Hanzaki, A. ^{[2
]}

Paul, H. ^{[3
]}

机构：

[1] Shahid Rajaee Teacher Training Univ, Sch Mech Engn, Tehran, Iran

[2] Univ Tehran, Sch Met & Mat Engn, Tehran, Iran

[3] Polish Acad Sci, Inst Met & Mat Sci, 25 Reymonta St, PL-30059 Krakow, Poland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 699卷

关键词：

Nanograin; AZ31; Shear band; TEM; ADIABATIC SHEAR-BAND; ALLOY; MICROSTRUCTURE; DEFORMATION; EVOLUTION; ULTRAFINE; TITANIUM;

D O I：

10.1016/j.jallcom.2016.12.424

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Shear bands were developed during accumulative back extrusion of Mg-3Al-12n alloy at 130 degrees C. Transmission electron microscopy was employed to study the substructural evolution prior to and during the development of macro shear bands. The results illustrated that nanograins with mean size of 100 nm were formed within the bands. The observations revealed that flow localization in magnesium is preceded by interactions of deformation twins, dislocations and micro shear bands. The substructure within the bands is evolved through development of rectangular subgrains as well as subdivision of elongated grains. These substructures transformed subsequently into equiaxed nano-sized grains through continuous recrystallization. EBSD analysis confirmed the contribution of extension twinning during shear band development. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：796 / 802

页数：7

共 28 条

[1] Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B [J].

Agnew, SR ;

Duygulu, Ö .

INTERNATIONAL JOURNAL OF PLASTICITY, 2005, 21 (06) :1161-1193

[2] Texture effects on development of shear bands in rolled AZ31 alloy [J].

Chun, Y. B. ;

Davies, C. H. J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 556 :253-259

[3] Dynamic precipitation in Mg-3Al-1Zn alloy during different plastic deformation modes [J].

Dogan, E. ;

Wang, S. ;

Vaughan, M. W. ;

Karaman, I. .

ACTA MATERIALIA, 2016, 116 :1-13

[4] Characterization of ultrafine and nano grained magnesium alloy processed by severe plastic deformation [J].

Fatemi-Varzaneh, S. M. ;

Zarei-Hanzaki, A. ;

Paul, H. .

MATERIALS CHARACTERIZATION, 2014, 87 :27-35

[5] The origin of microstructure inhomogeneity in Mg-3Al-1Zn processed by severe plastic deformation [J].

Fatemi-Varzaneh, S. M. ;

Zarei-Hanzaki, A. ;

Vaghar, R. ;

Cabrera, J. M. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 551 :128-132

[6] Shear deformation and grain refinement during accumulative back extrusion of AZ31 magnesium alloy [J].

Fatemi-Varzaneh, S. M. ;

Zarei-Hanzaki, A. ;

Izadi, S. .

JOURNAL OF MATERIALS SCIENCE, 2011, 46 (06) :1937-1944

[7] Shear banding phenomenon during severe plastic deformation of an AZ31 magnesium alloy [J].

Fatemi-Varzaneh, S. M. ;

Zarei-Hanzaki, A. ;

Cabrera, J. M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (09) :3806-3810

[8] Correlation of plastic deformation and dynamic recrystallization in magnesium alloy Zk60 [J].

Galiyev, A ;

Kaibyshev, R ;

Gottstein, G .

ACTA MATERIALIA, 2001, 49 (07) :1199-1207

[9] Microstructural and textural evolution of AZ31 magnesium alloy during differential speed rolling [J].

Huang, Xinsheng ;

Suzuki, Kazutaka ;

Watazu, Akira ;

Shigematsu, Ichinori ;

Saito, Naobumi .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 479 (1-2) :726-731

[10] Ultrafine-grain-sized zirconium by dynamic deformation [J].

Kad, B. K. ;

Gebert, J. -M. ;

Perez-Prado, M. T. ;

Kassner, M. E. ;

Meyers, M. K. .

ACTA MATERIALIA, 2006, 54 (16) :4111-4127

← 1 2 3 →