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- W2190996135 abstract "Abstract The mechanical and tribological properties of extruded aluminum matrix composites reinforced with various weight percentages (1, 3, 5, 7, 10 wt.%) of Al 13 Fe 4 complex metallic alloys (CMAs) were investigated. The nanocomposites were produced using conventional powder metallurgy and a hot extrusion process. The tribological behavior of the composites was investigated under normal loads in the range of 20–80 N using a reciprocating high-temperature tribo-tester over a temperature range of 25–350 °C. At an optimized reinforcing agent concentration of 5 wt.%, the composite showed a significant enhancement in Young's modulus (~ 108 MPa) and hardness (~ 1.85 GPa). The lowest coefficient of friction of 0.1 was attained at a temperature of 250 °C with a reinforcing agent concentration of 5 wt.%. Also, the wear rate was reduced by a factor of ~ 25 compared to the unreinforced aluminum specimen. The significant improvement in the tribological properties of the nanocomposite was attributed to the enhanced mechanical properties due to severe plastic deformation incurred during the extrusion process and incorporation of well distributed CMA nanoparticles in the matrix which provided oobstacles for dislocation motion. Detailed microstructural analyses revealed that incorporation of the second phase to the Al matrix led to microstructure refinement and increased the hardness up to ~ 2 GPa. Furthermore, the nanoparticles aided in the formation of hard and temperature-resistant tribo-layers which reduced the wear rate of the composite (Al–5 wt.% Al 13 Fe 4 ) down to 1.5 × 10 − 4 at 250 °C." @default.
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- W2190996135 date "2016-01-01" @default.
- W2190996135 modified "2023-09-26" @default.
- W2190996135 title "Mechanical and high temperature wear properties of extruded Al composite reinforced with Al 13 Fe 4 CMA nanoparticles" @default.
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- W2190996135 doi "https://doi.org/10.1016/j.matdes.2015.11.001" @default.
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