AN INVESTIGATION OF THE INFLUENCE OF NANO-COBALT OXIDE ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 7075 ALUMINIUM ALLOY
Journal Title: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) - Year 2018, Vol 8, Issue 4
Abstract
Aluminium Alloy AA7075 is the strongest heat-treatable aluminium series. For that they have suitable properties and tremendous applications, especially in the aviation and aerospace industries. The effect of a minor Nano-cobalt oxide on the microstructures and mechanical properties of AA7075 was investigated in this work. The investigation was carried out as a cast AA7075 with 0.2, 0.4, 0.6 and 0.8% Nano-cobalt. The optical microscopy demonstrates that the grain size of alloys was decreased with the increasing of Nano -cobalt oxide content. The Scanning electron microscopy and EDX show that the cobalt oxide present between the grains at the grain boundary. Moreover, there are Al-Zn-Mg, Al-Fe-Cu, Si-Al-Zn, Al-Fe-Cu-Co-Zn, and Al-o-Si-Zn-Cu compounds. The mechanical properties examination shows that the hardness decreased and yield stress, increased with an increasing in the Nano-cobalt content. The ultimate tensile stress and modulus elasticity also increased with the increase of Nano-cobalt content, except alloy with 0.8% Nano-cobalt which decreased to 5.87 GPA.
Authors and Affiliations
TALIB ABDULAMEER JASIM . , ALI HOBI HALEEM . , ZAINAB ABDULELLAH HADI .
Keywords
Related Articles
- EP ID EP430503
- DOI -
- Views 94
- Downloads 0
NUMERICAL MODELING OF TEMPERATURE DISTRIBUTION IN LASER BEAM WELDING OF 304 STAINLESS STEEL
A numerical method for solving the laser welding problem of heating and melting is developed in the present investigation. Laser welding is a fast, unbalanced and complex process which requires a non-uniform heat transfe...
Influence of Fiber Orientation on the Properties of Composites
Damage pattern on the surface of laminate with fiber orientations (00/150), (00/300), and (00/450) have been studied. E-glass/Epoxy composite laminate of thickness 4mm with size 100mmx100mm clamped on all the edges has b...
Effect of High Erbium on Mechanical Properties of Aluminium Alloy
The effects of the addition of the rare earth element, erbium (Er), on the microstructure and mechanical properties of LM 24 alloy were investigated. A microstructural characterisation was performed using an optical micr...
Thermal Analysis for Internal Combustion Cylinder Block
This paper presents a simulation and analysis for the thermal stresses of the internal combustion engine and analyzed its effects on cylinders and engine performance. The main aim of this paper is to make a simulation an...
Experimental Upset Study on Barreling Behaviour of A356 Varying Reinforced with Graphite and Granite Dust Composities
“An investigation has been performed into the effect of upset forging on commercially available A356, reinforced with Graphite and Granite dust in dry condition. The axi-symmetric specimens of cylindrical with aspect rat...