MechanicalPropertiesandMicrostructureofInSituTiB2-7055Composites

被引：7

作者：

CHEN dongLE YongkangBAI LiangMA NaihengLI XianfengWANG Haowei The State Key laboratory of Metal Matrix CompositesShanghai JiaoTong UniversityShanghai China ^{[200030
]}

机构：

来源：

Chinese Journal of Aeronautics | 2006年 / S1期

关键词：

metal matrix composite; in situ; mechanical properties; microstructure;

D O I：

暂无

中图分类号：

V257 [金属和非金属复合材料];

学科分类号：

0805 ; 080502 ;

摘要：

In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 nm uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation.

引用

页码：66 / 70

页数：5

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