Study on the in-situ SEM tension observation of E-A356 alloys

被引：7
|
作者：
Li, Jiwen [1 ,2 ]
Xie, Jingpei [2 ]
Wang, Wenyan [2 ]
Wei, Shizhong [1 ]
机构：
[1] Henan Engn Res Ctr Wear Resistant Mat, Luoyang 471003, Peoples R China
[2] Henan univ Sci & Technol, Coll Mat Sci & Eng, Luoyang 471003, Peoples R China
来源：
PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷
关键词：
E-A356; alloy; in-situ SEM tension; crack initiation; crack propagation;
D O I：
10.4028/www.scientific.net/MSF.561-565.147
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The fracture mechanisms of E-A356 alloys (T5 treatment) have been investigated by means of in situ SEM under nonaxial tension loading. It is found that the crack initiated at the casting defects, such as at the gas or the shrinkage pores, because of the debonding of the silicon particles from the Al matrix. The crack propagation was mainly in the Al matrix and along the matrix/particle interface secondarily. The crack growth could be influenced by the eutectic silicon particles, when it encountered the Si particles, the growth direction would be changed and turned toward the weaker areas. The fracture resistance or the mechanical properties of the E-A356 alloys will be improved by means of reducing, eliminating gas or shrinkage pores and increasing the interface bound strength of the eutectic silicon particles with the Al matrix.
引用
收藏
页码：147 / +
页数：2
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