Journal
JOM
Volume 73, Issue 12, Pages 4338-4348Publisher
SPRINGER
DOI: 10.1007/s11837-021-04955-w
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Funding
- deanship of scientific research (DSR) at King Abdulaziz University, Jeddah [RG-3-150-38]
- DSR
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Hybrid Al-based surface nanocomposites were successfully manufactured and investigated for industrial applications. By utilizing the friction stir process, AA6061 wrought sheets were combined with SiC, GNPs, and Al2O3 nanoparticles to achieve ultra-refined grains and excellent wear resistance behavior. The study aimed to achieve a balance between improving wear resistance rates and the surface hardness of the manufactured nanocomposites.
Hybrid Al-based surface nanocomposites were manufactured and investigated for industrial applications. The friction stir process (FSP) was successfully utilized to combine and incorporate AA6061 wrought sheets with different reinforcement nanoparticles: silicon carbide (SiC), solid lubricant graphene nanoplates (GNPs), and aluminum oxide (Al2O3). Tribological tests were utilized to assess the friction coefficient and wear resistance of the fabricated nanocomposites. The results showed that the AA6061/SiC_GNPs hybrid nanocomposite exhibited ultra-refined grains inside the processed zone with excellent wear resistance behavior. Hence, during the FSP, there was a 36-fold decrease in grain size. Furthermore, the wear rates by volume and mass losses were reduced by 46% and 90%, respectively, due to the self-lubrication properties of the GNPs combined with the SiC particles. Moreover, the friction coefficient of the hybrid AA6061/SiC_GNPs decreased by 30%. The SiC nanoparticles eliminate the negative effect of the GNPs on the hardness. Thus, achieving a balance between improving wear resistance rates and the surface hardness of the manufactured nanocomposites is one of the essential objectives of the study.
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