A Comprehensive Study of Aluminium Based Metal Matrix Composite Reinforced with Hybrid Nanoparticles

R. Venkatesh$^{1}$, Vaddi Seshagiri Rao$^{2}$, Sathish Rengarajan$^{2}$

$^{1}$Sathyabama Institute of Science and Technology, Research Scholar, Jeppiaar Nagar, Rajiv Gandhi Road, 600119 Chennai, India
$^{2}$St. Joseph’s College of Engineering, OMR, 600119 Chennai, India

Received: 15.11.2018; final version - 28.01.2019. Download: PDF

In this experimental investigation, the mechanical and machinability behaviour of aluminium matrix reinforced with hybrid nanocomposites are studied, considering their widespread application specifically in structural support systems. Aluminium alloy, copper (metal), Alumina (ceramic), and Graphite (an allotropic form of carbon) are chosen for the development of composites, and they justify the term hybrid. They are mixed in the proportion of Al6061—70%, Al$_2$O$_3$—12%, Cu—9%, Gr—9% by weight percentage and process by mechanical alloying method, resulting with an average particle size of 70 nm. The SEM and XRD analysis confirm that the materials enter into the nanoregime. Plate- and rod-like shapes are prepare with these composite materials by stir casting process at 500°C with rotational speed of 300 rpm. The maximum ultimate strength of 156 MPa and hardness of 431.4 MPa (44 HV) are achieved in the hybrid nanocomposites. The wire cut process assisted by electrical discharge machining is used to assess the machinability aspects of the material. The Taguchi methods of multi-objective optimization are successfully done. Analysis of variance is done to arrive at the correlation coefficient. Minor investigation is also done in order to understand the wear resistance of the material developed. The wear rate of 0.54$\cdot10^{-10}$ m$^2$/kg is observed at normal loading condition.

Key words: nanopowders, ceramics, metals and alloys, mechanical testing, machining, wear.

URL: http://mfint.imp.kiev.ua/en/abstract/v41/i04/0481.html

DOI: https://doi.org/10.15407/mfint.41.04.0481

PACS: 81.05.Bx, 81.05.Ni, 81.07.Wx, 81.20.Wk, 81.40.Pq, 81.70.Bt

Citation: R. Venkatesh, Vaddi Seshagiri Rao, and Sathish Rengarajan, A Comprehensive Study of Aluminium Based Metal Matrix Composite Reinforced with Hybrid Nanoparticles, Metallofiz. Noveishie Tekhnol., 41, No. 4: 481—500 (2019)

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