Enhanced damping capacity of nanolaminated graphene (reduced graphene oxide)/Al-Mg-Si composite

被引：14
作者：
Yang, Ganting [1 ]
Han, Yifan [1 ]
Lu, Anliang [1 ,2 ]
Guo, Qiang [1 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[2] City Univ Hong Kong, Dept Mech Engn, Kowloon, Hong Kong 999077, Peoples R China
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2022年 / 156卷
关键词：
Metal-matrix composites (MMCs); Graphene; Damping; Microstructural analysis; MECHANICAL-PROPERTIES; DEFORMATION MECHANISM; AL; ALUMINUM; STRENGTH; BEHAVIOR; DESIGN; ALLOYS;
D O I：
10.1016/j.compositesa.2022.106887
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cyclic uniaxial compression tests were carried out on micro-pillars fabricated from reduced graphene oxide (RGO)-reinforced Al-Mg-Si alloy that went through peak-ageing treatment. The composite pillars were found to have a significantly better damping capacity and improved resistance to plastic deformation as compared to the unreinforced matrix. These observations were further corroborated by the much higher damping coefficient of the composite pillars (eta = 0.3081 +/- 0.0803), almost doubled that for the alloy matrix alone (0.1560 +/- 0.0457). Site-specific TEM analysis revealed that the enhanced damping property of the composite came from a combined effect of dislocation impedance at the RGO/Al interface, the dislocation looping and cutting at the precipitates, and the formation of nano-twins in the alloy matrix upon deformation.
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页数：6
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