Twinning and the ductility of magnesium alloys Part II. "Contraction" twins

被引：794

作者：

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

机构：

[1] Deakin Univ, Fac Sci & Technol, Ctr Mat & Fibre Innovat, ARc Ctr Excellence Design Light Met, Geelong, Vic 3217, Australia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 464卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

tensile test; ductility; work softening; twinning;

D O I：

10.1016/j.msea.2007.02.109

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Magnesium and its alloys do not in general undergo the same extended range of plasticity as their competitor structural metals. The present work presents part 11 of a study that examines some of the roles deformation twinning might play in the phenomenon. A series of tensile and compression tests results are reported for common wrought alloys: AD31, ZK60 and ZM20. These data are combined with EBSD analysis and simple flow stress models to argue the following: (i) that "contraction" double twinning (which enables contraction along the c axis) can decrease the uniform elongation, and (ii) that compression double twinning can also account for shear failure at low strains. The last of these is described as a combined consequence of strain softening of the continuum and the local generation of twin sized voids. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：8 / 16

页数：9

共 34 条

[1]

Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y [J].