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Enhancing the tensile and ignition response of monolithic magnesium by reinforcing with silica nanoparticulates

Published online by Cambridge University Press:  29 May 2017

Gururaj Parande ,
Vyasaraj Manakari ,
Ganesh Kumar Meenashisundaram  and
Manoj Gupta
Gururaj Parande
Affiliation:
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
Vyasaraj Manakari
Affiliation:
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
Ganesh Kumar Meenashisundaram
Affiliation:
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
Manoj Gupta*
Affiliation:
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Low volume fraction (0.5, 1, and 2 vol%) SiO2 reinforced magnesium nanocomposites were synthesized using powder metallurgy technique followed by hot extrusion. The nanocomposites were studied for physical, microstructural, ignition, and mechanical properties to study the influence of nanoparticulate addition on monolithic magnesium. The grain size of the developed nanocomposites was observed to marginally decrease with the addition of SiO2 nanoparticulates with 2 vol% SiO2 addition resulting in a grain size of ∼23 μm which is ∼32% lower than that of pure Mg. The ignition temperature of pure Mg was enhanced with the addition of SiO2 nanoparticulates with Mg 2 vol% SiO2 nanocomposite exhibiting an ignition temperature of 611 °C (∼20 °C greater than pure Mg and AZ31 alloy). Under room temperature tensile loading, Hall–Petch strengthening mechanism was the most dominant wherein the addition of SiO2 nanoparticulates to pure magnesium enhances the strength within 0–2 vol% range and ductility in 0–1 vol% range.

Keywords

Mggrain sizethermogravimetric analysis (TGA)
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 11 , 14 June 2017 , pp. 2169 - 2178
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Michele Manuel

References

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