Fabrication of A356 aluminum alloy matrix composite with CNTs/Al2O3 hybrid reinforcements

A356 hypoeutectic aluminum-silicon alloys matrix composites reinforced by different contents of multiwalled carbon nanotubes (MWCNTs) were fabricated using a combination of rheocasting and squeeze casting techniques. A novel approach by adding MWCNTs into A356 aluminum alloy matrix with CNTs has been performed. This method is significant in debundling and preventing flotation of the CNTs within the molten alloy. The microstructures of nanocomposites and the interface between the aluminum alloy matrix and the MWCNTs were examined by using an optical microscopy (OM) and scanning electron microscopy (SEM) equipped with an energy dispersive X-ray analysis (EDX). This method remarkably facilitated a uniform dispersion of nanotubes within A356 aluminum alloy matrix as well as a refinement of grain size. In addition, the effects of weight fraction (0.5, 1.0, 1.5, 2.0, and 2.5 wt%) of the CNT-blended matrix on mechanical properties were evaluated. The results have indicated that a significant improvement in ultimate tensile strength and elongation percentage of nanocomposite occurred at the optimal amount of 1.5 wt% MWCNTs which represents an increase in their values by a ratio of about 50% and 280%, respectively, compared to their corresponding values of monolithic alloy. Hardness of the samples was also significantly increased by the addition of CNTs.

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Analysis and Optimization of Abrasive water Jet Machiningprocesses on the hybrid nano particle reinforced Aluminum alloy matrix composite material

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/923/1/012037 ◽

2020 ◽

Vol 923 ◽

pp. 012037

Author(s):

R. Venkatesh ◽

Vaddi Seshagiri Rao ◽

S. Ashwin kannan ◽

S.M. Mullaikodi

Keyword(s):

Composite Material ◽

Aluminum Alloy ◽

Matrix Composite ◽

Water Jet ◽

Abrasive Water Jet ◽

Nano Particle ◽

Alloy Matrix ◽

Aluminum Alloy Matrix

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Hot Working and Processing Maps of TiCp Reinforced Aluminum Alloy Matrix Composite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.535-536.296 ◽

2013 ◽

Vol 535-536 ◽

pp. 296-299 ◽

Cited By ~ 1

Author(s):

Su Hyeon Kim ◽

Jung Moo Lee ◽

Young Hee Cho ◽

Yeong Hwa Kim ◽

Hwa Jung Kim

Keyword(s):

Aluminum Alloy ◽

Matrix Composite ◽

Power Dissipation ◽

Material Model ◽

Hot Working ◽

Processing Maps ◽

Alloy Matrix ◽

Dynamic Material Model ◽

Aluminum Alloy Matrix ◽

Tic Particulates

Hot working behavior of an aluminum alloy matrix composite reinforced with TiC particulates was investigated by a high temperature compression test. Power dissipation maps were constructed using a dynamic material model and the deformation mechanism was investigated by means of an EBSD analysis. The interrelationship between the microstructure evolution and the efficiency of power dissipation was derived and the roles of TiC particles and other constituent phases in determining processing maps were further discussed.

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