Characterization of aluminium metal matrix composite fabricated by gas injection bottom pouring vacuum multi-stir casting process

Abstract

In the present work, a newly developed gas injection bottom pouring vacuum stir casting technique has been envisaged for the fabrication of Aluminium MMCs which is a fully automated and one of its kind. Aluminium 6063-T6 alloy is used as the matrix, and the aluminium oxide (Al2O3) particles are taken as reinforcement. Different experiments have been performed on the fabricated MMCs to ascertain its mechanical and morphological properties. The presence of various elements and grain morphology of the fabricated MMCs are confirmed by Energy Dispersive Spectroscopy (EDS), Scanning Electron Microscope (SEM) and mapping. The experimental results revealed that the hardness of Al/Al2O3MMC had increased by 1.71 times and maximum tensile strength had increased by 1.27 times in comparison to the monolithic aluminium alloy. The results establish that the proposed methodology of MMC fabrication can be effectively utilized for fabrication of homogeneously reinforced MMCs for various engineering and industrial applications.

Development of continuous flow magnetorheological fluid finishing process for finishing of small holes

“…From the review of literature, it is amply clear that the EDM process is the most commonly used non-conventional machining process for these aluminium-based MMCs [18]. In the present study, Al/Al 2 O 3− -MMC fabricated by gas injection bottom pouring vacuum multi-stir casting process is used as workpiece material [19]. Figure 4 shows the phenomena of interaction of the abrasive particle with surface asperity in the on-state and the off-state conditions.…”

Investigation of the effects of SiC reinforcement ratio in iron-based composite materials on corrosion properties

“…By adding carbon and various alloying elements or hard ceramic particles to iron or cast iron, iron-based composite materials are obtained (Wu et al, 2019;Majumdar et al, 2008;Szklarz et al, 2018). Composite materials containing a matrix metal are called metal matrix composites (MMCs) (Smith, Hashemi, and Prakash, 2014;Kataria and Mangal, 2018). Metallic matrix materials are generally Fe, Al, Cu, Ti, or Co metals or alloys (Chang et al, 2018).…”