The interactive role of inclusions and SiC reinforcement on the high-cycle fatigue resistance of particle reinforced metal matrix composites

被引：0
作者：
N. Chawla
C. Andes
L. C. Davis
J. E. Allison
J. W. Jones
机构：
[1] University of Michigan,Department of Materials Science and Engineering
[2] Arizona State University,Department of Chemical, Bio, and Materials Engineering
[3] Ford Research Laboratory,Physics Department
[4] Ford Motor Co.,Scientific Research Laboratory
[5] Ford Motor Co.,College of Engineering
[6] University of Michigan,undefined
来源：
Metallurgical and Materials Transactions A | 2000年 / 31卷
关键词：
Fatigue; Material Transaction; Fatigue Crack; Fatigue Life; Crack Initiation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effect of intermetallic inclusions on the fatigue crack initiation and growth in 2080 Al alloy and 2080/SiCp composites was investigated. Using surface replication, it was determined that, in the highcycle fatigue region, life is dominated by the initiation process. It was also determined that the majority of initiation sites were associated with intermetallic inclusions. While 2080/SiC/20p showed a definitive relationship between inclusion size and fatigue life, i.e., a higher inclusion size resulted in lower fatigue life, there was no correlation in 2080/SiC/30p. This was attributed to more of the load being shared by the higher volume fraction of SiC particles and smaller average inclusion sizes in the latter composite. A conceptual model is proposed that accounts for these observations and qualitatively shows the effect of reinforcement on stress enhancement in near-surface inclusions.
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页码：951 / 957
页数：6
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