Investigation of corrosion behaviour of Al 7075 / B4C / Al2O3 hybrid metal matrix composite

Author(s):  
M. Sambathkumar ◽  
R. Gukendran ◽  
M. Vijayanand
2018 ◽  
Vol 25 (6) ◽  
pp. 1187-1196 ◽  
Author(s):  
Shyam Lal ◽  
Sudhir Kumar ◽  
Zahid A. Khan

AbstractIn this paper, an inert gas assisted electromagnetic stir casting process is adapted for manufacturing a cast hybrid metal matrix composite (MMC) using Al2O3 and SiC particulates as a hard phase reinforcement in Al 7075 alloy metal matrix. Four different samples containing 5, 10, 15 and 20 wt% of Al2O3 and SiC with Al 7075 alloy composites were fabricated. The characterizations for all the samples were carried out through optical microstructure, scanning electron microscopy (SEM) fractograph, X-ray diffraction (XRD) analysis, differential thermal analysis (DTA) analysis and mechanical properties. The results revealed that the particles are uniformly distributed in the matrix. No peaks of Al4C3 were found. There is negligible loss of material in the composite. The tensile strength and microhardness of the hybrid composite are higher by 65.7% and 13.5%, respectively, when compared to its cast metal matrix Al 7075 alloy.


2015 ◽  
Vol 8 (S2) ◽  
pp. 101 ◽  
Author(s):  
Gaurav Mahajan ◽  
Nikhil Karve ◽  
Uday Patil ◽  
P. Kuppan ◽  
K. Venkatesan

Author(s):  
Barath M ◽  
◽  
Rajesh S ◽  
Duraimurugan P ◽  
◽  
...  

The abrasive mixed waterjet was with success utilized to chop several materials together with steel, metal and glass for a spread of business applications. This work focuses on surface roughness of hybrid metal matrix composite (AA6061, Al2O3, B4C). Machining was applied by AWJM (Abrasive Waterjet Cutting) at completely different parameters Water pressure, Traverse speed, Abrasive flow and stand-off distance. The reinforced composite was analyzed exploitation FE SEM (Field Emission Scanning lepton Microscope) and distribution of reinforced was studied by AFM (Atomic Force Microscopy). For optimum results surface roughness was calculated.


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