Investigations into microstructure and mechanical properties of Al 6061/SiCp metal matrix composite spur gear produced via powder metallurgy
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The characteristics of Al 6061/SiCp Metal Matrix Composite (MMC) have been established for checking the suitability oflightweight spur gear using Powder Metallurgy (P/M) technique. Aluminium powder reinforced with SiCp particle withvarious weight.% (0, 5, 10 & 15) and particle sizes (35 μm and 65 μm). The smaller sized spur gears of 4 mm module, 48 mmpitch circle diameter and 22 mm face width were chosen. The complex gear profiled compaction die assembly was manufacturedfor making net shaped gear without any machining operation. The H frame hydraulic press was used to compact gear sampleswith compaction pressures of 132 MPa and 165 MPa. Then gear samples were sintered using muffle furnace at 570 ºC. Theprepared gear samples were used for density measurement, bending strength test, hardness measurement and microstructureanalysis. The research work leads to the observation of Al 6061 with 10 wt.% & 35 μm size of (SiCp) P/M gear exhibiting agreater enhancement of mechanical properties than the unreinforced Al alloy. Thus the effect of adding ceramic particles SiCpwith Al 6061 enhanced the mechanical properties and enabling Al 6061/SiCp composite spur gear suitable for lightweightapplications.
Abstract
The characteristics of Al 6061/SiCp Metal Matrix Composite (MMC) have been established for checking the suitability oflightweight spur gear using Powder Metallurgy (P/M) technique. Aluminium powder reinforced with SiCp particle withvarious weight.% (0, 5, 10 & 15) and particle sizes (35 μm and 65 μm). The smaller sized spur gears of 4 mm module, 48 mmpitch circle diameter and 22 mm face width were chosen. The complex gear profiled compaction die assembly was manufacturedfor making net shaped gear without any machining operation. The H frame hydraulic press was used to compact gear sampleswith compaction pressures of 132 MPa and 165 MPa. Then gear samples were sintered using muffle furnace at 570 ºC. Theprepared gear samples were used for density measurement, bending strength test, hardness measurement and microstructureanalysis. The research work leads to the observation of Al 6061 with 10 wt.% & 35 μm size of (SiCp) P/M gear exhibiting agreater enhancement of mechanical properties than the unreinforced Al alloy. Thus the effect of adding ceramic particles SiCpwith Al 6061 enhanced the mechanical properties and enabling Al 6061/SiCp composite spur gear suitable for lightweightapplications.
참고문헌 (22)
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