Enhanced mechanical response of hybrid alloy AZ31 /AZ91 based on the addition of Si3N4 nanoparticles

The tensile strength and ductility of AZ31/AZ91 hybrid magnesium alloy with Si3N4 nanoparticles were studied. AZ31/AZ91 hybrid alloy nanocomposite containing Si3N4 nanoparticle reinforcement was fabricated using solidification processing followed by hot extrusion. The nanocomposite exhibited a simil...

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Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2011, Vol.528 (21), p.6545-6551
Main Authors: PARAMSOTHY, M, CHAN, J, KWOK, R, GUPTA, M
Format: Article
Language:English
Subjects:
Applied sciences
Dispersion hardening metals
Elasticity. Plasticity
Exact sciences and technology
Failure
Magnesium base alloys
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Powder metallurgy. Composite materials
Production techniques
Silicon nitride
Texture
Ultimate tensile strength
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Summary:The tensile strength and ductility of AZ31/AZ91 hybrid magnesium alloy with Si3N4 nanoparticles were studied. AZ31/AZ91 hybrid alloy nanocomposite containing Si3N4 nanoparticle reinforcement was fabricated using solidification processing followed by hot extrusion. The nanocomposite exhibited a similar grain size to the monolithic hybrid alloy, reasonable Si3N4 nanoparticle distribution, non-dominant (0002) texture in the longitudinal direction, and 13% higher hardness than the monolithic hybrid alloy. Compared to the monolithic hybrid alloy (in tension), the nanocomposite simultaneously exhibited higher yield strength, ultimate strength, failure strain and work of fracture (+12%, +5%, +64% and +71%, respectively). Compared to the monolithic hybrid alloy (in compression), the nanocomposite exhibited higher yield strength and ultimate strength, lower failure strain and higher work of fracture (+35%, +4%, -6% and +6%, respectively). The beneficial effects of Si3N4 nanoparticle addition on the enhancement of tensile and compressive properties of AZ31/AZ91 hybrid alloy were investigated.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2011.05.003