Characteristics of the contraction twins formed close to the fracture surface in Mg-3Al-1Zn alloy deformed in tension

被引：156

作者：

Cizek, P. ^{[1
]}

Barnett, M. R. ^{[1
]}

机构：

[1] Deakin Univ, CMFI, ARC Ctr Excellence Design Light Met, Waurn Ponds, Vic 3217, Australia

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 09期

关键词：

Magnesium alloys; Plastic deformation; Transmission electron microscopy (TEM); Twinning; Misorientation;

D O I：

10.1016/j.scriptamat.2008.06.041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Characteristics of the "contraction" twins, formed close to the fracture surface in Mg-3Al-1Zn alloy deformed in tension approximately perpendicular to the grain c-axes, are investigated using transmission electron microscopy. The grain c-axis contractions were largely accommodated by {10 (1) over bar1}-{10 (1) over bar2} double-twins in a variant characterized by 38 degrees < 1210 > twin/matrix misorientation in conjunction with dislocation slip. A possible interpretation of the observed preference for this variant formation is given and some crystal plasticity modelling is performed to elucidate the matter. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：959 / 962

页数：4

共 12 条

[1] Study of slip mechanisms in a magnesium alloy by neutron diffraction and modeling [J].

Agnew, SR ;

Tomé, CN ;

Brown, DW ;

Holden, TM ;

Vogel, SC .

SCRIPTA MATERIALIA, 2003, 48 (08) :1003-1008

[2] Non-Schmid behaviour during secondary twinning in a polycrystalline magnesium alloy [J].

Barnett, M. R. ;

Keshavarz, Z. ;

Beer, A. G. ;

Ma, X. .

ACTA MATERIALIA, 2008, 56 (01) :5-15

[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] Deformation microstructures and textures of some cold rolled Mg alloys [J].

Barnett, MR ;

Nave, MD ;

Bettles, CJ .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 386 (1-2) :205-211

[5] Reorientation and stress relaxation due to twinning:: Modeling and experimental characterization for Mg [J].

Clausen, B. ;

Tome, C. N. ;

Brown, D. W. ;

Agnew, S. R. .

ACTA MATERIALIA, 2008, 56 (11) :2456-2468

[6] A SELF-CONSISTENT ANISOTROPIC APPROACH FOR THE SIMULATION OF PLASTIC-DEFORMATION AND TEXTURE DEVELOPMENT OF POLYCRYSTALS - APPLICATION TO ZIRCONIUM ALLOYS [J].

LEBENSOHN, RA ;

TOME, CN .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (09) :2611-2624

[7] A STUDY OF THE STRESS STATE ASSOCIATED WITH TWIN NUCLEATION AND PROPAGATION IN ANISOTROPIC MATERIALS [J].

LEBENSOHN, RA ;

TOME, CN .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1993, 67 (01) :187-206

[8] Microstructures and textures of pure magnesium deformed in plane-strain compression [J].

Nave, MD ;

Barnett, MR .

SCRIPTA MATERIALIA, 2004, 51 (09) :881-885

[9] Characterisation of strengthening precipitate phases in a Mg-Y-Nd alloy [J].

Nie, JF ;

Muddle, BC .

ACTA MATERIALIA, 2000, 48 (08) :1691-1703

[10] TRANSMISSION ELECTRON-MICROSCOPY EXAMINATION AND ANALYSIS OF AN ANOMALOUS STACKING-FAULT IN H.C.P. METALS [J].

SONG, SG ;

GRAY, GT .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1995, 71 (02) :263-274

← 1 2 →