Centrifugally Cast Functionally Graded Materials - A Review

Saiyathibrahim A¹, Subramaniyan R², Dhanapal P³

^1,2Department of Metallurgical Engineering, P.S.G College of Technology, Coimbatore, India
³Department of Mechanical Engineering, Karpagam Institute of Technology, Coimbatore, India

Abstract

Functionally Graded Materials (FGMs) are a class of engineered materials characterized by a spatial variation of composition and microstructure aiming at controlling corresponding functional (i.e. mechanical, thermal, electrical, etc.) properties. The tailored gradual variation of microstructural features may be obtained through non-uniform distributions of the reinforcement phase(s) with different properties, sizes and shapes, as well as by interchanging the role of reinforcement and matrix materials in a continuous manner. Wide ranges of processing methods are considered on the production of FGMs. Centrifugal casting is one of the most effective methods for processing functionally graded materials (FGMs) made of aluminum, and it has been demonstrated that a compositional gradient can be obtained by using centrifugal casting to segregate phases with different densities. The addition of particles to the melt drastically changes the viscosity of the melt, and this has implications for casting processes. Microstructural evaluation, wear mechanisms, porosity, stress distributions, etc. of various metal-metal, metal-ceramic and ceramic-ceramic FGMs are discussed to expose an overall view for carrying future research. Finally the applications of FGMs in various fields, which are still facing new innovations are considered.

Keywords

• Functionally graded materials, Centrifugal casting, characteristics of FGM, Applications of FGM

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Cite this Article as Follows

Saiyathibrahim A, Subramaniyan R, Dhanapal P. "Centrifugally Cast Functionally Graded Materials - A Review" International Conference on Systems, Science, Control, Communication, Engineering and Technology (2016): 68-73. Print.