Particle size effect on the interfacial properties of SiC particle-reinforced Al-Cu-Mg composites

被引：103

作者：

Guo, Xiaolei ^{[1
]}

Guo, Qiang ^{[1
]}

Nie, Junhui ^{[2
]}

Liu, Zhiying ^{[1
]}

Li, Zhiqiang ^{[1
]}

Fan, Genlian ^{[1
]}

Xiong, Ding-Bang ^{[1
]}

Su, Yishi ^{[1
]}

Fan, Jianzhong ^{[2
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[2] Beijing Gen Res Inst Nonferrous Met, Natl Engn & Technol Res Ctr Nonferrous Met Compos, Beijing 100088, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 711卷

关键词：

Metal matrix composites; Nanoindentation; Hardness; Interface structure; Geometrically necessary dislocations; METAL-MATRIX COMPOSITES; DEPTH SENSING INDENTATION; FLAKE POWDER-METALLURGY; PRECIPITATION PROCESSES; MECHANICAL-PROPERTIES; VOLUME FRACTION; ALLOYS; STRENGTH; FRACTURE; DEFORMATION;

D O I：

10.1016/j.msea.2017.11.068

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In particle-reinforced metal matrix composites, geometrically necessary dislocations (GNDs) form on the matrix side close to the particle/matrix interface. The mechanical behavior of the bulk composite is affected by the nature of the region populated with GNDs. In this study, the hardness evolution across the reinforcement/matrix interface in 15 vol% SiC particle (SiCp)-reinforced 2009 Al composites with varying particle sizes were studied by nanoindentation with high spatial resolution. The hardness data were then correlated with the microstructures of the composites as well as their bulk tensile properties. It was found that decrease in particle size was associated with a reduction in the punched zone width and an enhancement in the strength of the bulk composite. These findings were interpreted by the effect of GNDs on the ageing kinetics of the matrix, and the improved load-transfer capability through the reinforcement/matrix interface in composites reinforced by smaller particles.

引用

页码：643 / 649

页数：7

共 44 条

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