【摘 要】
：
This paper describes the synthesis of Al7075 metal matrix composites reinforced with SiC, and the characterization of their microstructure and mechanical behavi
【机 构】
：
Mechanical Engineering Department,Department of Materials Engineering
论文部分内容阅读
This paper describes the synthesis of Al7075 metal matrix composites reinforced with SiC, and the characterization of their microstructure and mechanical behavior. The mechanically milled Al7075 micron-sized powder and SiC nanoparticles are dynamically com-pacted using a drop hammer device. This compaction is performed at different temperatures and for various volume fractions of SiC nanoparticles. The relative density is directly related to the compaction temperature rise and indirectly related to the content of SiC nanopar-ticle reinforcement, respectively. Furthermore, increasing the amount of SiC nanoparticles improves the strength, stiffness, and hardness of the compacted specimens. The increase in hardness and strength may be attributed to the inherent hardness of the nanoparticles, and other phenomena such as thermal mismatch and crack shielding. Nevertheless, clustering of the nanoparticles at aluminum particle boundaries make these regions become a source of concentrated stress, which reduces the load carrying capacity of the compacted nanocomposite.
其他文献
Rare earth element (REE) concentrations of two different types of groundwaters (high SO42- water-SW and high alkaline waterCW) from coal bearing aquifer (-400～-2
Mine dust is classified as one of five natural coal mining disasters because it can harm the health of miners and poses a serious threat to the safety of the co
In this study, we characterized strain F9 and evaluated the interaction between strain F9 and hematite by scanning electron microscopy(SEM), Fourier transform i
We developed a mathematical optimization model coupling chemical compositions and high-temperature characteristics of sintering materials, targeting the best qu
In the 20CrMnTi steel production process, the nitrogen content increased by 19 × 10-6 and 29 × 10-6, respectively, during ladle furnace(LF) refining and durin
A mathematical model has been presented to study the combustion of a single copper concentrate particle with high moisture con-tent. By using the presented mode
The microstructures and properties of hot-rolled low-carbon ferritic steel have been investigated by optical microscopy, field-emission scanning electron micros
Low-carbon steel sheets DC04 used in the automotive industry were subjected to cold rolling for thickness reduction from 20%to 89%. The desired thickness was ac
Tensile fatigue tests were designed to study the relation between the tangential magnetic memory signal and dislocations. According to experimental results, in
The 00Cr13Ni5Mo2 supermartensitic stainless steel was first tempered at 570-730°C for 2 h to observe the microstructure and hardness changes. The tempering tem