Influence of reinforcements on solidification microstructure and fatigue properties of cast aluminum alloy composites

被引：0
|
作者：
Miyahara, H [1 ]
Maruno, Y
Nishihata, Y
Ogi, K
机构：
[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 812, Japan
[2] Kyushu Univ, Higashi Ku, Fukuoka 8128581, Japan
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2006年 / 59卷 / 02期
关键词：
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Influences of reinforcements on crystal growth of matrix alloy in cast composites were investigated, and an advantage of reinforcements on rotating bending fatigue belabor were examined. In the composite specimens, the alpha dendrite is deformed during solidification, and the eutectic structure is distributed around fibers. The solutal diffusion field around dendrite tip governs the tip undercooling. The fatigue strength of composites specimens is influenced by the cluster of reinforcement particles rather than the matrix structure. The clusters of particles introduce the cracks but also interrupt the crack propagation. Therefore, reinforcement particles eventually better the fatigue properties of notched specimens.
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页码：255 / 261
页数：7
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