Microstructural and mechanical properties of Al-Mg/Al2O3 nanocomposite prepared by mechanical alloying |
| |
Authors: | J Safari GH Akbari A ShahbazkhanM Delshad Chermahini |
| |
Affiliation: | a Department of Material Science and Engineering, Shahid Bahonar University of Kerman, P.O. Box No. 76135-133, Kerman, Iran b Research Center for Mineral Industries, Shahid Bahonar University of Kerman, P.O. Box No. 76135-133, Kerman, Iran c Islamic Azad University, Saveh Branch, Saveh, Iran d Materials and Energy Research Center, Karaj, Iran |
| |
Abstract: | The effect of milling time on the microstructure and mechanical properties of Al and Al-10 wt.% Mg matrix nanocomposites reinforced with 5 wt.% Al2O3 during mechanical alloying was investigated. Steady-state situation was occurred in Al-10Mg/5Al2O3 nanocomposite after 20 h, due to solution of Mg into Al matrix, while the situation was not observed in Al/5Al2O3 nanocomposite at the same time. For the binary Al-Mg matrix, after 10 h, the predominant phase was an Al-Mg solid solution with an average crystallite size 34 nm. Up to 10 h, the lattice strain increased to about 0.4 and 0.66% for Al and Al-Mg matrix, respectively. The increasing of lattice parameter due to dissolution of Mg atom into Al lattice during milling was significant. By milling for 10 h the dramatic increase in microhardness (155 HV) for Al-Mg matrix nanocomposite was caused by grain refinement and solid solution formation. From 10 to 20 h, slower rate of increasing in microhardness may be attributed to the completion of alloying process, and dynamic and static recovery of powders. |
| |
Keywords: | Scanning electron microscopy X-ray diffraction Al-Mg matrix nanocomposite Mechanical alloying Particle size |
本文献已被 ScienceDirect 等数据库收录! |
|