Title of article :
Fabrication and Characterization of Al5083/Al2O3 Surface Nanocomposite via Friction Stir Processing
Author/Authors :
Heidarpour, Akbar Department of Metallurgy and Materials Engineering - Hamedan University of Technology, Hamedan, Iran , Ahmadifard, Saeed Department of Material Engineering - Bu Ali Sina University, Hamedan, Iran , Kazemi, Shahab Department of Material Engineering - Bu Ali Sina University, Hamedan, Iran
Abstract :
In the present study, Al5083- Al2O3 nanocomposite was successfully prepared by friction stir processing (FSP) with the rotational speed of 710 rpm and travel speed of 14 mm/min. In order to improve the distribution of Al2O3 particles, a net of holes was designed on the surface of Al5083 sheet. The samples were characterized by optical (OM) and scanning electron microscopy (SEM), and microhardness, tensile, and wear tests. The results showed that FSP is an effective process to fabricate Al5083- Al2O3 surface nanocomposite. Microstructural observation demonstrated fine and equiaxed grains and homogenous distribution of Al2O3 nanoparticles in the stir zone (SZ). The presence of Al2O3 nanoparticles leads to a decrease in the grain size from 45 to 7 μm and an increase in microhardness from 80 to 140 Hv and tensile strength from 280 to 335 MPa. Wear test results showed an improvement in wear resistance due to its higher hardness. Also, the wear mechanism in all samples was abrasive.
Keywords :
Friction stir processing , Nanocomposite , Microhardness , Grain refinement , Wear
