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Nanomaterials 2012, 2(2), 147-162; doi:10.3390/nano2020147

Al2O3 Nanoparticle Addition to Commercial Magnesium Alloys: Multiple Beneficial Effects

1
Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore
2
Singapore Technologies Kinetics Ltd (ST Kinetics), 249 Jalan Boon Lay, 619523, Singapore
*
Author to whom correspondence should be addressed.
Received: 29 March 2012 / Revised: 24 April 2012 / Accepted: 22 May 2012 / Published: 29 May 2012
(This article belongs to the Special Issue Composite Nanomaterials)
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Abstract

The multiple beneficial effects of Al2O3 nanoparticle addition to cast magnesium based systems (followed by extrusion) were investigated, constituting either: (a) enhanced strength; or (b) simultaneously enhanced strength and ductility of the corresponding magnesium alloys. AZ31 and ZK60A nanocomposites containing Al2O3 nanoparticle reinforcement were each fabricated using solidification processing followed by hot extrusion. Compared to monolithic AZ31 (tension levels), the corresponding nanocomposite exhibited higher yield strength (0.2% tensile yield strength (TYS)), ultimate strength (UTS), failure strain and work of fracture (WOF) (+19%, +21%, +113% and +162%, respectively). Compared to monolithic AZ31 (compression levels), the corresponding nanocomposite exhibited higher yield strength (0.2% compressive yield strength (CYS)) and ultimate strength (UCS), lower failure strain and higher WOF (+5%, +5%, −4% and +11%, respectively). Compared to monolithic ZK60A (tension levels), the corresponding nanocomposite exhibited lower 0.2% TYS and higher UTS, failure strain and WOF (−4%, +13%, +170% and +200%, respectively). Compared to monolithic ZK60A (compression levels), the corresponding nanocomposite exhibited lower 0.2% CYS and higher UCS, failure strain and WOF (−10%, +7%, +15% and +26%, respectively). The capability of Al2O3 nanoparticles to enhance the properties of cast magnesium alloys in a way never seen before with micron length scale reinforcements is clearly demonstrated.
Keywords: Al2O3 nanoparticles; AZ series; ZK series; microstructure; mechanical properties Al2O3 nanoparticles; AZ series; ZK series; microstructure; mechanical properties
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Paramsothy, M.; Chan, J.; Kwok, R.; Gupta, M. Al2O3 Nanoparticle Addition to Commercial Magnesium Alloys: Multiple Beneficial Effects. Nanomaterials 2012, 2, 147-162.

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