Microstructural characterization of high pressure die cast Mg-Zn-Al-RE alloys

被引：27

作者：

Xiao, Wenlong ^{[1
,2
]}

Zhu, Suming ^{[2
]}

Easton, Mark A. ^{[2
]}

Dargusch, Matthew S. ^{[1
]}

Gibson, Mark A. ^{[3
]}

Nie, Jian-feng ^{[2
]}

机构：

[1] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia

[2] Monash Univ, Dept Mat Engn, CAST Cooperat Res Ctr, Melbourne, Vic 3800, Australia

[3] CSIRO Proc Sci & Engn, Melbourne, Vic 3169, Australia

来源：

MATERIALS CHARACTERIZATION | 2012年 / 65卷

关键词：

Magnesium alloys; Mg-Zn-Al-RE; High pressure die casting; Solidification; Microstructure; MECHANICAL-PROPERTIES; PHASE-EQUILIBRIA; CREEP-BEHAVIOR; MAGNESIUM; DEFECTS;

D O I：

10.1016/j.matchar.2012.01.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg-(1-10)Zn-(4-6)Al-4RE alloys were prepared by high pressure die casting and their microstructures were characterized. Optical observations revealed the presence of externally solidified grains (ESGs) in the microstructure. The amount of ESGs initially decreased with increasing Zn content, but further additions of Zn led to a steady increase in the amount of ESGs. The Mg-4Zn-4Al-4RE alloy was found to have the least ESGs and the most uniform grain structure. The alloys with higher Zn and Al contents showed a more dendritic microstructure with coarse RE-containing intermetallic phases and network of a Mg-Zn-Al ternary phase. Compared with the commercial AE44 (Mg-4Al-4RE) alloy, additions of Zn reduced the amount of Al-RE phases and resulted in the formation of Al2REZn2 phase. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：28 / 36

页数：9

共 34 条

[1]

Abbott T, 2003, HDB METALLURGICAL PR

[2] Preface to the viewpoint set on: The current state of magnesium alloy science and technology [J].

Agnew, S. R. ;

Nie, J. F. .

SCRIPTA MATERIALIA, 2010, 63 (07) :671-673

[3]

[Anonymous], JCPDS PDF 2 REL 2001

[4]

Bakke P, 2005, MAGNESIUM TECHNOLOGY 2005, P291

[5] Die casting for high performance - Focus on alloy development [J].

Bakke, P ;

Westengen, H .

ADVANCED ENGINEERING MATERIALS, 2003, 5 (12) :879-885

[6]

Bakke P, 2003, MAGNESIUM TECHNOLOGY 2003, P171

[7] Trends in the development of new Mg alloys [J].

Bamberger, M. ;

Dehm, G. .

ANNUAL REVIEW OF MATERIALS RESEARCH, 2008, 38 :505-533

[8] THE MAGNETIC-STRUCTURES OF CE3AL11 - A SINGLE-CRYSTAL STUDY [J].

BOUCHERLE, JX ;

GIVORD, F ;

LAPERTOT, G ;

MUNOZ, A ;

SCHWEIZER, J .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 148 (03) :397-408

[9]

BUSCHOW KHJ, 1966, Z METALLKD, V57, P162

[10] The effect of microstructural features and defects on the ductility of high pressure die cast AS21, AM60 and AZ91 [J].

Easton, M ;

Abbott, T ;

Cáceres, C .

MAGNESIUM ALLOYS 2003, PTS 1 AND 2, 2003, 419-4 :147-152

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