| Compression Creep Behavior of High Volume Fraction of SiC Particles Reinforced Al Composite Fabricated by Pressureless Infiltration |
| |
| 作者单位： | Department of Physics and Materials Science City University of Hongkong Kowloon HK SAR China |
| |
| 基金项目： | HK Research Project (9040749) |
| |
| 摘 要： | The compression creep deformation of the high volume fraction of SiC particles reinforced Al-Mg-Si composite fabricated by pressure-less infiltration was investigated. The experimental results show that the creep stress exponents are very high at temperatures of 673 K, 723 K and 773 K, and if taking the threshold stress into account, the true stress exponent of minimum creep strain rate is still approximately 5, although the volume fraction of reinforcements is very high. The creep strain rate in the high volume fraction rein- forced aluminum alloy matrix composites is controlled by matrix lattice diffusion. It is found that the creep-strengthening effect of high volume fraction of silicon carbide particles is significant, although the particles do not form effective obstacles to dislocation motion.
|
Compression Creep Behavior of High Volume Fraction of SiC Particles Reinforced Al Composite Fabricated by Pressureless Infiltration |
| |
| Authors: | XU Fu-min WU Lawrence Chi-man HAN Guang-wei TAN Yi |
| |
| Abstract: | The compression creep deformation of the high volume fraction of SiC particles reinforced Al-Mg-Si composite fabricated by pressure-less infiltration was investigated. The experimental results show that the creep stress exponents are very high at temperatures of 673 K, 723 K and 773 K, and if taking the threshold stress into account, the true stress exponent of minimum creep strain rate is still approximately 5, although the volume fraction of reinforcements is very high. The creep strain rate in the high volume fraction reinforced aluminum alloy matrix composites is controlled by matrix lattice diffusion. It is found that the creep-strengthening effect of high volume fraction of silicon carbide particles is significant, although the particles do not form effective obstacles to dislocation motion. |
| |
| Keywords: | composite creep SiC aluminum Pressureless Infiltration Composite Reinforced SiC Particles Volume Fraction High Creep Behavior silicon carbide particles form effective obstacles dislocation motion significant aluminum alloy composites controlled matrix lattice diffusion |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
