Basal and non-basal dislocation slip in Mg-Y

被引：227

作者：

Sandloebes, Stefanie ^{[1
]}

Friak, Martin ^{[2
]}

Neugebauer, Joerg ^{[2
]}

Raabe, Dierk ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany

[2] Max Planck Inst Eisenforsch GmbH, Dept Computat Mat Design, D-40237 Dusseldorf, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 576卷

关键词：

Mg alloys; Mg-Y; Deformation; Dislocations; Transmission electron microscopy; CORE STRUCTURE; MAGNESIUM ALLOYS; HCP METALS; COMPUTER-SIMULATION; SCREW DISLOCATION; PYRAMIDAL SLIP; DEFORMATION; DUCTILITY; EDGE; TEMPERATURE;

D O I：

10.1016/j.msea.2013.03.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The activation of non-basal slip systems is of high importance for the ductility in hcp Mg and its alloys. In particular, for Mg-Y alloys where a higher activation of pyramidal dislocation slip causes an increased ductility detailed characterization of the activated slip systems is essential to understand and describe plasticity in these alloys. In this study a detailed analysis of the activated dislocations and slip systems via post-mortem TEM and SEM-EBSD based slip band analysis in 3% deformed Mg-3 wt% Y is presented. The analysis reveals a substantial activity of pyramidal < c+a > dislocations with different Burgers vectors. The obtained dislocation densities and active slip systems are discussed with respect to atomistic simulations of nonbasal dislocations in hcp Mg. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：61 / 68

页数：8

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