Effect of ball milling time on the structural characteristics and mechanical properties of nano-sized Y2O3 particle reinforced aluminum matrix composites produced by powder metallurgy route |
| |
| Affiliation: | 1. Selcuk University, Technology Faculty, Metallurgical and Materials Engineering, Konya 42075, Turkey;2. Selcuk University, Engineering Faculty, Mechanical Engineering Department, Akşehir 42550, Turkey;3. Selcuk University, Technology Faculty, Mechanical Engineering Department, Konya 42075, Turkey |
| |
| Abstract: | Mechanical milling presents an effective solution in producing a homogenous structure for composites. The present study focused on the production of 0.5 wt% yttria nanoparticle reinforced 7075 aluminum alloy composite in order to examine the effects of yttria dispersion and interfacial bonding by ball milling technique. The 7075 aluminum alloy powders and yttria were mechanically alloyed with different milling times. The milled composites powders were then consolidated with the help of hot pressing. Hardness, density, and tensile tests were carried out for characterizing the mechanical properties of the composite. The milled powder and the microstructural evolution of the composites were analyzed utilizing scanning and transmission electron microscopy. A striking enhancement of 164% and 90% in hardness and ultimate tensile strength, respectively, were found compared with the reference 7075 aluminum alloy fabricated with the same producing history. The origins of the observed increase in hardness and strength were discussed within the strengthening mechanisms' framework. |
| |
| Keywords: | Ball milling Aluminum Metal matrix composites Powder metallurgy Mechanical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
