铝合金基石墨复合材料的阻尼行为

DAMPING BEHAVIOR OF GRAPHITE/ALUMINIUM ALLOY COMPOSITES

1.
Laboratory of lnternal Friction and Defects in Solids, University of Science and Technology of China, Hefei 230026;
2.
Department of Materials Science and Engineering, Southeast University, Nanjing 210018;
3.
Department of Materials Science and Engineering, Kyushu University, Fukuoka 812. Japan;
4.
Government Industrial Research Institute, Kyushu, Japen

摘要

摘要: 用内耗技术研究了石墨颗粒/铝硅复合材料的低频阻尼行为,考查了阻尼对石墨含量、测量频率、温度和应变振帽的依赖关系以及相应的弹性模量的变化,比较了铸态和挤压变形复合材料的阻尼特征.对其阻尼机制作了初步的探讨.
- 复合材料 /
- 石墨 /
- 阻尼 /
- 位错 /
- 应变振幅效应
Abstract: Damping behavior at low frequency was studied on aluminium silicon-matrix graphite particles composites with the method of internal friction technique.The dependence of damping on graphite content,frequency,temperature,strain amplitude,and the variation of elastic modulus were investigated.The damping characteristics of as-cast and as-extruded composites were compared.The preliminary inquiry was made on the damping mechanisms of the composite materials.
- composites /
- graphite /
- damping /
- dislocation /
- strain amplitude-dependent effect