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Microstructural and Hardness Study of A390/20wt.% SiC Functionally Graded Metal Matrix Composite

Amal Vijay, Prem Kumar J., S. Anoop Kumar


Functionally graded materials are the upcoming new class of advanced materials, which exhibit gradual change in the microstructure and the composition in a definite direction, and hence variation in functional performance within a part. Functionally graded metal matrix composites (FGMMC) are FGM with metal and ceramic constituents. Aluminum-Silicon alloys are well-known for their unique combination of desirable characteristics, which includes excellent castability and less density combined with good mechanical properties. One such alloy that has been developed specifically for its wear resistance is the hypereutectic aluminum-silicon alloy A390. The research of wear behavior of this alloy at high temperatures has attracted attention in the past years. However, prospects of hypereutectic A390 alloy reinforced with SiC in a functionally graded manner are not discussed much in literature. The present study focuses on the development of A390/20wt.% SiC Functionally Graded Composite for high temperature tribological applications. The functionally graded A390/20% SiC is fabricated using centrifugal casting. The strengthening phases observed in the microstructural study are constituted by SiCp in the composite, which is formed in a graded manner confirming the FGMMC development. The hardness value showed a decreasing trend from outer to the inner region as expected from a functionally graded material. The hardness at the outer periphery of the developed FGMMC is also found to be higher than that of A390 alloy indicating higher wear resistance of the material.


A390/SiC, centrifugal casting, metal matrix composite, microstructure, hardness, SiC particles

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Rana RS, Purohit R, Das S. Reviews on the influences of alloying elements on the microstructure and mechanical properties of aluminum

alloys and aluminum alloy composites. International Journal of Scientific and research publications. 2012 Jun 6;2(6):1–7.

Luo D, Wang HY, Ou-Yang ZT, Chen L, Wang JG, Jiang QC. Microstructure and mechanical properties of Mg–5Sn alloy fabricated by a centrifugal casting method. Materials Letters. 2014 Feb 1;116:108–11.

Rahvard MM, Tamizifar M, Boutorabi SM, Shiri SG. Characterization of the graded distribution of primary particles and wear behavior in the A390 alloy ring with various Mg contents fabricated by centrifugal casting. Materials & Design (1980–2015). 2014 Apr 1;56:105–14.

Arsha AG, Jayakumar E, Rajan TP, Antony V, Pai BC. Design and fabrication of functionally graded in- situ aluminium composites for automotive pistons. Materials & Design. 2015 Dec 25;88:1201–9.

Zhang K, Yu H, Liu JY, Li YX, Liu J, Zhang JL. Microstructure and property of a functionally graded aluminum silicon alloy fabricated by semi-solid backward extrusion process. Materials Science and Engineering: A. 2015 Jan 29;624:229–38.

Sharma P, Sharma S, Khanduja D. A study on microstructure of aluminium matrix composites. Journal of Asian Ceramic Societies. 2015 Sep 1;3(3):240–4.

Mukunda PG, Shailesh RA, Rao SS. Influence of rotational speed of centrifugal casting process on appearance, microstructure, and sliding wear behaviour of Al-2Si cast alloy. Metals and Materials international. 2010 Feb. 1;16(1): 137–43.

Madhusudhan, Narendranath S, GC Mohan Kumar, Properties of Centrifugal Casting at Different Rotational Speeds of the Die, International Journal of Emerging Technology and Advanced Engineering, ISSN 2250–2459, Volume 3 (2013), Issue 1.

Mohanavel V, Rajan K, Kumar SS, Udishkumar S, Jayasekar C. Effect of silicon carbide reinforcement on mechanical and physical properties of aluminum matrix composites. Materials Today: Proceedings. 2018 Jan 1;5(1):2938–44.

Mohamadigangaraj J, Nourouzi S, AVAL HJ. Microstructure, mechanical and tribological properties of A390/SiC composite produced by compocasting. Transactions of Nonferrous Metals Society of China. 2019 Apr 1;29(4):710–21.

Rajaram G, Kumaran S, Rao TS, Kamaraj M. Studies on high temperature wear and its mechanism of Al–Si/graphite composite under dry sliding conditions. Tribology international. 2010 Nov 1;43(11):2152–8.

Vijeesh V, Prabhu KN. Review of microstructure evolution in hypereutectic Al–Si alloys and its effect on wear properties. Transactions of the Indian Institute of Metals. 2014 Feb;67(1):1–8.

Sahu PS, Banchhor R. Effect of Silicon Carbide Reinforcement on Wear and Tribological Properties of Aluminium Matrix Composites. Int. J. Innov. Sci. Eng. Technol. 2016;3:293–9.

Singh RK, Telang A, Satyabrata DA. Microstructure, mechanical properties and two-body abrasive wear behaviour of hypereutectic Al— Si—SiC composite. Transactions of Nonferrous Metals Society of China. 2020 Jan 1;30(1):65–75.

Fukui Y. Fundamental investigation of functionally gradient material manufacturing system using centrifugal force. JSME International Journal. Ser. 3, Vibration, control Engineering, Engineering for Industry. 1991 Mar 15;34(1):144–8.

Mortensen A, Suresh S. Functionally graded metals and metal-ceramic composites: Part 1 Processing. International Materials Reviews. 1995 Jan 1;40(6):239–65.

Suresh S, Mortensen A. Functionally graded metals and metal-ceramic composites: Part 2 Thermomechanical behaviour. International Materials Reviews. 1997 Jan 1;42(3):85–116.

Gao JW, Wang CY. Modeling the solidification of functionally graded materials by centrifugal casting. Materials Science and Engineering: A. 2000 Nov 15;292(2):207–15.



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