Effect of Graphene Nanoplatelets addition on mechanical properties of pure aluminum using a semi-powder method

Abstract In recent years, graphene has attracted considerable research interest in all fields of science due to its unique properties. Its excellent mechanical properties lead it to be used in nano-composites for strength enhancement. This paper reports an Aluminum–Graphene Nanoplatelets (Al/GNPs) composite using a semi-powder method followed by hot extrusion. The effect of GNP nano-particle integration on tensile, compressive and hardness response of Al is investigated in this paper. It is demonstrated that 0.3 wt% Graphene Nanoplatelets distributed homogeneously in the matrix aluminum act as an effective reinforcing filler to prevent deformation. Compared to monolithic aluminum (in tension), Al–0.3 wt% GNPs composite exhibited higher 0.2% yield strength (+14.7%), ultimate tensile strength (+11.1%) and lower failure strain (−40.6%). Surprisingly, compared to monolithic Al (in compression), Al–0.3 wt% GNPs composite exhibited same 0.2% compressive yield strength and lower ultimate compression strength (−7.8%), and lower failure strain (−20.2%). The Al–0.3 wt% GNPs composite exhibited higher Vickers hardness compared to monolithic aluminum (+11.8%). Scanning electron microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS) and X-ray diffraction (XRD) were used to investigate the surface morphology, elemental percentage composition, and phase analysis, respectively.

[1]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[2]  S. R. Bakshi,et al.  Carbon nanotube reinforced metal matrix composites - a review , 2010 .

[3]  Jun Gou,et al.  Development of magnesium-graphene nanoplatelets composite , 2015 .

[4]  R. M. Aikin,et al.  The role of equiaxed particles on the yield stress of composites , 1991 .

[5]  C. N. Lau,et al.  Superior thermal conductivity of single-layer graphene. , 2008, Nano letters.

[6]  J. Luster,et al.  Mechanical properties of aluminium alloy 6061–Al2O3 composites , 1993 .

[7]  F. J. Humphreys,et al.  Strengthening mechanisms in particulate metal matrix composites , 1991 .

[8]  Di Zhang,et al.  Reinforcement with graphene nanosheets in aluminum matrix composites , 2012 .

[9]  G. Fudenberg,et al.  Ultrahigh electron mobility in suspended graphene , 2008, 0802.2389.

[10]  Dae-gun Kim,et al.  Sintering characteristic of Al2O3-reinforced 2xxx series Al composite powders , 2005 .

[11]  A. Balandin,et al.  Thermal properties of graphene and multilayer graphene: Applications in thermal interface materials , 2012 .

[12]  K. Easterling,et al.  Phase Transformations in Metals and Alloys , 2021 .

[13]  A. Balandin,et al.  Thermal Properties of the Hybrid Graphene-Metal Nano-Micro-Composites: Applications in Thermal Interface Materials , 2012, 1202.0330.

[14]  A. Balandin,et al.  Graphene-multilayer graphene nanocomposites as highly efficient thermal interface materials. , 2012, Nano letters.

[15]  R. German.  Powder metallurgy science , 1984 .

[16]  S. Hussain,et al.  Effect of graphene nanoplatelets (GNPs) addition on strength and ductility of magnesium-titanium alloys , 2013 .

[17]  Z. Zhang,et al.  Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength , 2006 .

[18]  John Parthenios,et al.  Subjecting a graphene monolayer to tension and compression. , 2009, Small.

[19]  J. Kysar,et al.  Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene , 2008, Science.

[20]  R. Arsenault,et al.  Dislocation generation due to differences between the coefficients of thermal expansion , 1986 .

[21]  P. Withers,et al.  An introduction to metal matrix composites , 1993 .

[22]  F. Pan,et al.  Powder metallurgy of Mg–1%Al–1%Sn alloy reinforced with low content of graphene nanoplatelets (GNPs) , 2014 .