Mechanical and metallurgical studies of multi-walled carbon nanotube–reinforced aluminium metal matrix surface composite by friction stir processing

The aluminum alloy 5083 was reinforced with multi-walled carbon nanotubes (MWCNTs) by using friction stir processing (FSP). Different MWCNT volume percentages of 0, 6.06, 12.12, and 18.18% were reinforced into the 5083 aluminium metal matrix. Tensile tests were carried out, and a 24% increase was achieved with 12.12% MWCNTs. Hardness was obtained within the stir zone with the 6.06% of MWCNTs. Scanning Electron Microscopy (SEM) analysis revealed the breakdown of MWCNTs, thus leading to uniform dispersion. Wear rate decreased by 18% with an increase in MWCNTs.