Abstract
Non-contact methods for characterization of metal matrix composites have the potential to accelerate the development and study of advanced composite materials. In this study, diametrical compression of small disk specimens was used to understand the mechanical properties of metal matrix micro and nano composites. Analysis was performed using an inverse method that couples digital image correlation and the analytical closed form formulation. This technique was capable of extracting the tension and compression modulus values in the metal matrix nanocomposite disk specimens. Specimens of aluminum and aluminum reinforced with either Al2O3 nanoparticles or graphene nanoplatelets (GNP) were synthesized using a powder metallurgy approach that involved room temperature milling in ethanol, and low temperature drying followed by single action compaction. The elastic and failure properties of MMNC materials prepared using the procedure above are presented.
Highlights
Metal matrix nanocomposites (MMNCs) are a new class of metal matrix composite (MMC) materials where the reinforcement and/or matrix phase(s) are nanoscale in at least one dimension
The standard methods used to investigate the tensile and compressive behavior of metallic materials have been used to investigate the mechanical properties of particulate-reinforced MMCs and MMNCs (Tabandeh Khorshid et al, 2010)
We propose a hybrid method involving diametrical compression of a disk specimen together with the digital image correlation (DIC) method to study the mechanical behavior of MMCs and nanocomposites
Summary
Metal matrix nanocomposites (MMNCs) are a new class of metal matrix composite (MMC) materials where the reinforcement and/or matrix phase(s) are nanoscale in at least one dimension. These nanoscale features can lead to desirable mechanical properties due to Hall–Petch strengthening or Orowan strengthening mechanisms. MMNCs are promising materials owing to their potential for high specific strength, stiffness, and wear resistance The mechanical properties, such as yield strength, ultimate strength, modulus, and hardness of metals (Ferguson et al, 2014), MMC (Sajjadi et al, 2012), and MMNCs (Derakhshandeh Haghighi et al, 2012), have been investigated by a number of researchers. The standard methods used to investigate the tensile and compressive behavior of metallic materials have been used to investigate the mechanical properties of particulate-reinforced MMCs and MMNCs (Tabandeh Khorshid et al, 2010)
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