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Title: Nanoparticle addition to enhance the mechanical response of magnesium alloys including nanoscale deformation mechanisms
Authors: Paramsothy, M. 
Gupta, M. 
Keywords: Magnesium alloys
Mechanical properties
Nanoscale deformation mechanisms
Issue Date: 2013
Citation: Paramsothy, M.,Gupta, M. (2013). Nanoparticle addition to enhance the mechanical response of magnesium alloys including nanoscale deformation mechanisms. Magnesium Technology : 283-288. ScholarBank@NUS Repository.
Abstract: In this study, various magnesium alloy nanocomposites derived from AZ (Aluminium-Zinc) or ZK (Zinc-Zirconium) series matrices and containing Al 2O3, Si3N4, TiC or carbon nanotube (CNT) nanoparticle reinforcement (representative oxide, nitride, carbide or carbon nanoparticle reinforcement, respectively) were fabricated using solidification processing followed by hot extrusion. The main aim here was to simultaneously enhance tensile strength and ductility of each alloy using nanoparticles. The magnesium-oxygen strong affinity and magnesium-carbon weak affinity (comparison of extremes in affinity) are both well known in the context of magnesium composite processing. However, an approach to possibly quantify this affinity in magnesium nanocomposite processing is not clear. In this study accordingly, Nanoscale Electro Negative Interface Density or NENID quantifies the nanoparticle-alloy matrix interfacial area per unit volume in the magnesium alloy nanocomposite taking into consideration the electronegativity of the nanoparticle reinforcement. The beneficial (as well as comparative) effect of the nanoparticles on each alloy is discussed in this article. Regarding the mechanical performance of the nanocomposites, it is important to understand the experimentally observed nanoparticle-matrix interactions during plastic deformation (nanoscale deformation mechanisms). Little is known in this area based on direct observations for metal matrix nanocomposites. Here, relevant multiple nanoscale phenomena includes the emanation of high strain zones (HSZs) from nanoparticle surfaces.
Source Title: Magnesium Technology
ISBN: 9781118605523
ISSN: 15454150
Appears in Collections:Staff Publications

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