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

Wenlong Xiao; Suming Zhu; Mark A. Easton; Matthew S. Dargusch; Mark A. Gibson; Jian Feng Nie

doi:10.1016/j.matchar.2012.01.001

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

Wenlong Xiao^*
, Suming Zhu
, Mark A. Easton
, Matthew S. Dargusch
, Mark A. Gibson
, Jian Feng Nie

^*Corresponding author for this work

Monash University
University of Queensland
CSIRO

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	28-36
Number of pages	9
Journal	Materials Characterization
Volume	65
DOIs	https://doi.org/10.1016/j.matchar.2012.01.001
State	Published - Mar 2012
Externally published	Yes

Keywords

High pressure die casting
Magnesium alloys
Mg-Zn-Al-RE
Microstructure
Solidification

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10.1016/j.matchar.2012.01.001

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title = "Microstructural characterization of high pressure die cast Mg-Zn-Al-RE alloys",

abstract = "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.",

keywords = "High pressure die casting, Magnesium alloys, Mg-Zn-Al-RE, Microstructure, Solidification",

author = "Wenlong Xiao and Suming Zhu and Easton, \{Mark A.\} and Dargusch, \{Matthew S.\} and Gibson, \{Mark A.\} and Nie, \{Jian Feng\}",

year = "2012",

month = mar,

doi = "10.1016/j.matchar.2012.01.001",

language = "英语",

volume = "65",

pages = "28--36",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Microstructural characterization of high pressure die cast Mg-Zn-Al-RE alloys

AU - Xiao, Wenlong

AU - Zhu, Suming

AU - Easton, Mark A.

AU - Dargusch, Matthew S.

AU - Gibson, Mark A.

AU - Nie, Jian Feng

PY - 2012/3

Y1 - 2012/3

N2 - 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.

AB - 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.

KW - High pressure die casting

KW - Magnesium alloys

KW - Mg-Zn-Al-RE

KW - Microstructure

KW - Solidification

UR - https://www.scopus.com/pages/publications/84856058525

U2 - 10.1016/j.matchar.2012.01.001

DO - 10.1016/j.matchar.2012.01.001

M3 - 文章

AN - SCOPUS:84856058525

SN - 1044-5803

VL - 65

SP - 28

EP - 36

JO - Materials Characterization

JF - Materials Characterization

ER -

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

Abstract

Keywords

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