Production of functionally graded SiC/Al-Cu-Mg composite by centrifugal casting

Abstract

The research work includes development of vertical centrifugal casting setup for functionally graded metal composite (LM25-SiC) preparation. Material parameters like wt % of SiC Particles (2, 3.5, and 5%), average grain size of SiC particles (75, 44, and 6.5 µm) and process parameter like rotational speed of the mould (1000, 1100, 1200 RPM) are selected for characterization. Samples were tested for hardness and wear resistance to investigate the effect parameters on change of properties. Microstructure analysis was also performed. Total 11 FGM samples were made by varying different process parameters. It is found that hardness and wear resistant property improves with increase in wt% of SiC particles and mould rotation speed. It is also found that hardness and wear resistance value increases with reduction of average grain size of SiC particles. Increased mould rotation speed improves the level of distribution of reinforcing particles from inner to outer region.

A review on fabrication and characteristics of functionally graded aluminum matrix composites fabricated by centrifugal casting method

“…Another study on FGAMC of aluminum alloy A359-20 wt% SiC fabricated through centrifugal casting was reported by Rodríguez-Castro and team [82]. The effect 18 Variation in hardness and wear rate of Al-Cu-Mg-5 wt% SiC FGAMC [80] of mold rotation speed on microstructure and mechanical properties at different locations of FGAMC has been investigated. Better gradient formation of SiC reinforcement displayed along the radial direction of the sample fabricated under 1300 rpm than 700 rpm shown in Fig.…”

“…Fig. 14 Effect of different particle sizes on hardness, tensile strength and wear resistance of LM25-10 wt% AlB 2 FGAMC [72] been carried out by Ömer Savaş et al [80]. The processing of FGAMC included the pouring of the mixture of alloy and SiC particles at 750 °C into a spinning mold under the centrifugal speed of 600 rpm.…”

“…Fig 17. Optical microstructure images different location of Al-Cu-Mg-5 wt% SiC FGAMC from exterior to interior region across the thickness[80] …”

Effect of processing factors on the characteristics of centrifugal casting

“…can all be tailored by manipulating various mould factors and processing factors associated with the production technique. The process is effectively used for production of Functionally graded materials (FGMs) which include different functionally graded metal matrix composites (FGMMCs) [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Aluminium and aluminium matrix FGMMcs reinforced with hard SiCp particles [15][16][17][18][19][20][21][22] can be cited as an examples.…”

Certain Aspects of Particle Distribution in Castings Formed in Rotating Moulds

“…However, over the edges, the centrifugal casting process has proved to be a cost effective, simple process for fabricating FGMs. Indeed, several investigators [8][9][10][11][12][13][14][15][16][17][18][19] have adopted this method involving a rotating mould for casting of FGMs.…”