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Enhancing physical and mechanical properties of Mg using nanosized Al2O3 particulates as reinforcement

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Abstract

A magnesium-based composite with 1.1 volume percentage of nanosized Al2O3 particulates reinforcement was fabricated using an innovative disintegrated melt deposition technique followed by hot extrusion. Al2O3 particulates with an equivalent size of 50 nm were used as reinforcement. Microstructural characterization of the materials revealed grain refinement of magnesium matrix due to incorporation, retention, and uniform distribution of reinforcement. Physical properties characterization revealed that the addition of nano-Al2O3 particulates as reinforcement improves the dimensional stability of pure magnesium. Mechanical properties characterization revealed that the presence of nano-Al2O3 particulates as reinforcement leads to a significant increase in microhardness, dynamic elastic modulus, 0.2 pct yield strength (YS), ultimate tensile strength (UTS), and ductility of pure magnesium. The results revealed that the combined tensile properties of these materials are superior when compared to Mg reinforced with much higher volume percentage of SiC. An attempt is made in the present study to correlate the effect of nano-Al2O3 particulates as reinforcement with the microstructural, physical, and mechanical properties of magnesium.

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Authors and Affiliations

  1. the Department of Mechanical Engineering, National University of Singapore, 17576, Singapore

    S. F. Hassan (Ph.D. Student) & M. Gupta (Associate Professor)

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  1. S. F. Hassan
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  2. M. Gupta
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Hassan, S.F., Gupta, M. Enhancing physical and mechanical properties of Mg using nanosized Al2O3 particulates as reinforcement. Metall Mater Trans A 36, 2253–2258 (2005). https://doi.org/10.1007/s11661-005-0344-4

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  • DOI: https://doi.org/10.1007/s11661-005-0344-4

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