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Khan, Sohaib Zia
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Publications (6/6 displayed)
- 2022Free Intermetallic Cladding Interface between Aluminum and Steel through Friction Stir Processingcitations
- 2021Effect of Overheating and Incorrect Material Selection on Power Plant Superheater Tubecitations
- 2021Fabrication and Characterization of Steel-Base Metal Matrix Composites Reinforced by Yttria Nanoparticles through Friction Stir Processingcitations
- 2021MICROSTRUCTURE AND MECHANICAL CHARACTERIZATIONS OF LM6-AL/AL2O3 METAL MATRIX COMPOSITES PRODUCED BY STIR CASTING TECHNIQUEcitations
- 2018Effect of carbon fiber winding layer on torsional characteristics of filament wound composite shaftscitations
- 2017Effect of hybrid reinforcement on the performance of filament wound hollow shaftcitations
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article
MICROSTRUCTURE AND MECHANICAL CHARACTERIZATIONS OF LM6-AL/AL2O3 METAL MATRIX COMPOSITES PRODUCED BY STIR CASTING TECHNIQUE
Abstract
<jats:p>LM6-aluminum alloy based-metal matrix composites (MMC) reinforced with Al2O3 ceramic particles were fabricated through stir casting. Al2O3 particles with different weight content (5, 10, and 15%) were dispersed into the LM6 Al-Si alloy. The macro and microstructures, mechanical properties, fracture surface, hardness, and impact toughness of the resulted MMCs together with the plain LM6 alloy were evaluated. The results showed that the added 5 wt.% Al2O3 was distributed homogenously with good wettability. The addition of Al2O3 refined the constituents of the LM6 alloy; Al-Si dendrites and the α-Al grains. At 10 wt.% Al2O3, some localized clusters appeared with some granular cracks. Increasing the Al2O3 addition to 15 wt.% resulted in particle agglomerations with multiple cracks and porosity. Both the tensile strength and the 0.2 % proof strength of the produced MMCs were improved up to 10 wt.% Al2O3 and then reduced. The fracture surface of 5 wt.% MMC was brittle-ductile mixed-mode fracture dominated by brittle fracture. The other percentages were almost brittle fracture. The hardness of the produced MMCs was remarkably improved. The hardness value reaches to about 86 HV at 10 wt. % Al2O3 addition. The impact toughness of the resulted composite materials was decreased notably at higher addition of Al2O3.</jats:p>