Tensile properties of reactive stir-mixed and squeeze cast Al/CuO np -based metal matrix nanocomposites

Metal matrix nanocomposites (MMNCs) are expected to possess superior mechanical properties that would make them ideal candidates to increase energy and fuel efficiency in the transportation sector. However, economical methods to disperse nanoparticles in metals must be developed to reach this goal....

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-08, Vol.611, p.326-332
Main Authors: Ferguson, J B, Aguirre, Ismael, Lopez, Hugo, Schultz, Benjamin F, Cho, Kyu, Rohatgi, Pradeep K
Format: Article
Language:English
Subjects:
Alloys
Aluminum
ALUMINUM ALLOYS (50 TO 99 AL)
Aluminum base alloys
COMPOSITES
COPPER ALUMINUM ALLOYS
COPPER OXIDE
Economics
MECHANICAL PROPERTIES
Nanocomposites
Nanoparticles
PARTICLES
PROPERTIES
Tensile properties
TENSILE STRENGTH
Ultimate tensile strength
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Summary:Metal matrix nanocomposites (MMNCs) are expected to possess superior mechanical properties that would make them ideal candidates to increase energy and fuel efficiency in the transportation sector. However, economical methods to disperse nanoparticles in metals must be developed to reach this goal. In this work, MMNCs were synthesized from Al and CuO np by reactive stir mixing followed by squeeze casting. Subsequently, the tensile properties of these materials were measured to determine the effect of the initial nanoparticle (NP) concentration of CuO np on the exhibited tensile properties. Comparison of the MMNCs processed under the same conditions and tested in the as-cast condition shows an apparent increase in ultimate tensile strength (UTS), but little change in yield strength and ductility. Grain size was found to decrease with increasing CuO np concentration. The MMNC behavior is compared to Al-Cu alloys in an attempt to shed light on the mechanisms responsible for the change in properties.
ISSN:0921-5093
DOI:10.1016/j.msea.2014.06.008