Study on microstructure of squeeze casting AZ91D alloy

被引：12
|
作者：
Yang, Y. L. [1 ,2 ]
Peng, L. M. [1 ,2 ]
Fu, P. H. [1 ,2 ]
Hu, B. [1 ,2 ]
Ding, W. J. [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composite, Shanghai 200240, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2011年 / 27卷 / 01期
关键词：
Squeeze casting; AZ91D alloy; Microstructure; COMPOSITIONAL INHOMOGENEITY; DIE;
D O I：
10.1179/174328409X433831
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present paper reports the investigation of the microstructure distribution of squeeze cast AZ91D alloy. The microstructure of squeeze cast AZ91D alloy is not uniform and is composed of four zones, which are chilled layer, segregation zone, pressured crystallisation area and hot spot area respectively. Moreover, in the pressured crystallisation area, the microstructure sequence in the transverse section from the outside to the inside could be divided into four sublayers, such as fine equiaxial dendrite area, dendrite area with a high directivity, confusion dendrite area and disorder dendrite area. The volume fraction of the intermetallic compound Mg17Al12 also varied with the location. The volume fraction of Mg17Al12 in the pressured crystallisation area is the largest except in the segregated zone.
引用
收藏
页码：189 / 193
页数：5
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