The role of extrusion texture on strength and its anisotropy in a Mg-base alloy composed of the Long-Period-Structural-Order phase

被引：54

作者：

Garces, G. ^{[1
]}

Munoz-Morris, M. A. ^{[1
]}

Morris, D. G. ^{[1
]}

Jimenez, J. A. ^{[1
]}

Perez, P. ^{[1
]}

Adeva, P. ^{[1
]}

机构：

[1] CENIM CSIC, Dept Met Phys, E-28040 Madrid, Spain

来源：

INTERMETALLICS | 2014年 / 55卷

关键词：

Intermetallics; Anisotropy; Mechanical properties; Texture; Microstructure; MECHANICAL-PROPERTIES; SLIP; 18R; 14H;

D O I：

10.1016/j.intermet.2014.07.015

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：

A Mg-Y-Zn alloy composed almost completely of the Long-Period-Stacking-Ordered (LPSO) phase has been prepared by casting and extrusion to flat bar. An elongated microstructure is obtained with different grain orientations along the extrusion, transverse and normal directions, leading to a strong orientation dependence of strength. Differences of tensile and compressive stress are also noted. The importance of basal slip and other dislocation-dependent deformation mechanisms is discussed. The large tension-compression strength differences are considered to imply that twinning plays an important role in determining strength. The analysis of deformation mechanisms and strengthening is supported by metallographic studies of surface slip bands and dislocation distributions. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：167 / 176

页数：10

共 35 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].

Abe, E ;

Kawamura, Y ;

Hayashi, K ;

Inoue, A .

ACTA MATERIALIA, 2002, 50 (15) :3845-3857

[2] Multiscale deformation heterogeneity in twinning magnesium investigated with in situ image correlation [J].

Aydiner, C. Can ;

Telemez, M. Ayca .

INTERNATIONAL JOURNAL OF PLASTICITY, 2014, 56 :203-218

[3] Twinning and the ductility of magnesium alloys Part II. "Contraction" twins [J].

Barnett, M. R. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 464 (1-2) :8-16

[4]

Bettles C, 2012, WOODHEAD PUBL MATER, pXIII

[5] The structure of long period stacking/order Mg-Zn-RE phases with extended non-stoichiometry ranges [J].

Egusa, D. ;

Abe, E. .

ACTA MATERIALIA, 2012, 60 (01) :166-178

[6] Flow asymmetry and nucleation stresses of {10(1)over-bar2} twinning and non-basal slip in magnesium [J].

El Kadiri, Haitham ;

Baird, J. C. ;

Kapil, J. ;

Oppedal, A. L. ;

Cherkaoui, M. ;

Vogel, Sven C. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2013, 44 :111-120

[7]

Hagihara K, 2013, MATER TRANS, V54, P693, DOI [10.2320/matertrans.M1201208, 10.2320/matertrans.MI201208]

[8] High-temperature compressive deformation behavior of Mg97Zn1Y2 extruded alloy containing a long-period stacking ordered (LPSO) phase [J].

Hagihara, K. ;

Kinoshita, A. ;

Fukusumi, Y. ;

Yamasaki, M. ;

Kawamura, Y. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 560 :71-79

[9] Plastic Deformation Behavior of Mg12ZnY LPSO-Phase with 14H-Typed Structure [J].

Hagihara, K. ;

Sugino, Y. ;

Fukusumi, Y. ;

Umakoshi, Y. ;

Nakano, T. .

MATERIALS TRANSACTIONS, 2011, 52 (06) :1096-1103

[10] Effect of long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy [J].

Hagihara, K. ;

Kinoshita, A. ;

Sugino, Y. ;

Yamasaki, M. ;

Kawamura, Y. ;

Yasuda, H. Y. ;

Umakoshi, Y. .

ACTA MATERIALIA, 2010, 58 (19) :6282-6293

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