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1769230 
Journal Article 
Development of new magnesium based alloys and their nanocomposites 
Alam, MdE; Han, S; Nguyen, Q; Hamouda, AMS; Gupta, M 
2011 
Yes 
Journal of Alloys and Compounds
ISSN: 0925-8388 
509 
34 
8522-8529 
WOS:000292914000008 
In the present study, 1 and 2 wt.% of aluminum were successfully incorporated into magnesium based AZ31 alloy to develop new AZ41 and AZ51 alloys using the technique of disintegrated melt deposition. AZ41-Al2O3 and AZ51-Al2O3 nanocomposites were also successfully synthesized through the simultaneous addition of aluminum (1 and 2 wt.%, respectively) and 1.5 vol.% nano-sized alumina into AZ31 magnesium following same route. Alloy and composite samples were then subsequently hot extruded at 400 degrees C and characterized. Microstructural characterization studies revealed equiaxed grain structure, reasonably uniform distribution of particulate and intermetallics in the matrix and minimal porosity. Physical properties characterization revealed that addition of both aluminum and nano-sized alumina reduced the coefficient of thermal expansion of monolithic AZ31. The presence of both Al and nano-sized Al2O3 particles also assisted in improving overall mechanical properties including microhardness, engineering and specific tensile strengths, ductility and work of fracture. The results suggest that these alloys and nanocomposites have significant potential in diverse engineering applications when compared to magnesium AZ31 alloy. (C) 2011 Elsevier B.V. All rights reserved. 
Magnesium alloy; Nanocomposite; AZ31; Al2O3; Nanoparticles