Twinning of CaMgSi phase in a cast Mg-1.0Ca-0.5Si-0.3Zr alloy

被引：17

作者：

Ai, Yanling ^{[1
]}

Luo, C. P. ^{[1
]}

Liu, Jiangwen ^{[1
]}

机构：

[1] S China Univ Technol, Coll Mech Engn, Guangzhou 510641, Peoples R China

来源：

ACTA MATERIALIA | 2007年 / 55卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CaMgSi; three-fold twin; orientation domain; Mg-Ca-Si alloy; transmission electron microscopy (TEM);

D O I：

10.1016/j.actamat.2006.08.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two types of twins and an orientation domain (orientation twin) were found in CaMgSi particles formed in a Mg-Ca-Si alloy by transmission electron microscopy. The two types of twins were shown to be a (102) twin with the (102) plane serving as the twinning plane and a (011) twin with the (011) plane serving as the twinning plane. In addition to the frequently observed two-fold twin, two different three-fold twins were also observed in the (102) twinned CaMgSi particles; their crystallographic features are discussed in detail. The boundaries of both the (102) and (011) twins were found to be coincident with the twinning plane. The orientation domains were formed by one segment rotating 60 degrees about the [100] axis relative to the other. The possible formation mechanisms of the twins and orientation domain are discussed based on a crystallographic consideration. (c) 2006 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：531 / 538

页数：8

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