Centrifugal Casting and Characterisation of Primary Silicon and Mg2Si Dispersed Aluminium Functionally Graded Materials

P. Midhun Krishnan; Sanil Hari; E. Jayakumar; T.P.D. Rajan; K. Narayan Prabhu

doi:10.4028/www.scientific.net/MSF.830-831.11

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HomeMaterials Science ForumMaterials Science Forum Vols. 830-831Centrifugal Casting and Characterisation of...

Centrifugal Casting and Characterisation of Primary Silicon and Mg₂Si Dispersed Aluminium Functionally Graded Materials

Abstract:

Aluminium based FGM rings, reinforced by in-situ primary Si and primary Si/ Mg₂Si hybrid reinforcement were successfully fabricated by centrifugal casting and micro structural, chemical, hardness and corrosion characteristics were evaluated. It was observed that in Al-20Si ring the primary Si particles were present mostly in inner region and few in outer region where as in Al-20Si-3Mg ring both the primary silicon and Mg₂Si were completely found in the inner region only resulting in a graded FGM structure. The hardness values were measured along radial direction of samples and variations corresponding to micro structural variation were analysed. Optical Emission spectroscopic studies have revealed the remarkable compositional changes along radial direction. Corrosion characteristics were also evaluated both in particle rich and depleted regions.

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Periodical:

Materials Science Forum (Volumes 830-831)

Pages:

11-14

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.830-831.11

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Online since:

September 2015

Authors:

P. Midhun Krishnan, Sanil Hari, E. Jayakumar, T.P.D. Rajan*, K. Narayan Prabhu

Keywords:

Aluminium, Centrifugal Casting, FGM, Hyper-Eutectic Alloy, In Situ Composite

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