Taguchi GRA optimization of stir casting parameters in Al-SiC composite
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Aluminium SiC composites are promising in frictional and breaking material applications because of its tribological properties. The current work concentrates on optimization of stir casting parameters such as stirring speed, pouring temperature andstirrer blade design, and their outcome on mechanical behaviour of Al/SiC composite prepared by stir casting. Theoptimization technique used is Taguchi grey relational analysis. A Taguchi L9 orthogonal array was designed and experimentswere conducted based on the designed parameters. The ultimate tensile strength and hardness values were tested for everycomposite. Derived on the average outputs evaluated from Taguchi optimized Grey Relational Analysis, a stirring speed of 700RPM, pouring temperature at 670 ºC and alternate stirring blade design were predicted to be the optimized factors. AnAnalysis of Variance was performed to recognize the controlling factors. The pouring temperature was identified to hold theleading major control of 75.19% on the mechanical properties of the composite. Confirmation test carried with the optimalfactors identified an enhancement of 52.85% in Grey Relational Grade. Microstructure examination of Al/SiC composite ofthe confirmation trial exhibited SiC particle reinforcement in the Al matrix.
Abstract
Aluminium SiC composites are promising in frictional and breaking material applications because of its tribological properties. The current work concentrates on optimization of stir casting parameters such as stirring speed, pouring temperature andstirrer blade design, and their outcome on mechanical behaviour of Al/SiC composite prepared by stir casting. Theoptimization technique used is Taguchi grey relational analysis. A Taguchi L9 orthogonal array was designed and experimentswere conducted based on the designed parameters. The ultimate tensile strength and hardness values were tested for everycomposite. Derived on the average outputs evaluated from Taguchi optimized Grey Relational Analysis, a stirring speed of 700RPM, pouring temperature at 670 ºC and alternate stirring blade design were predicted to be the optimized factors. AnAnalysis of Variance was performed to recognize the controlling factors. The pouring temperature was identified to hold theleading major control of 75.19% on the mechanical properties of the composite. Confirmation test carried with the optimalfactors identified an enhancement of 52.85% in Grey Relational Grade. Microstructure examination of Al/SiC composite ofthe confirmation trial exhibited SiC particle reinforcement in the Al matrix.
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