Title: Optimisation of porosity of 7075 Al alloy 10% SiC composite produced by stir casting process through Taguchi method

Authors: Rajesh Kumar Bhushan, Sudhir Kumar, S. Das

Addresses: School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu, J&K (India). ' School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu, J&K (India). ' Advanced Materials and Processes Research Institute, Bhopal (India)

Abstract: In this paper an attempt has been made to achieve a set of values of stir casting process variables that may yield optimum porosity to the 7075 Al alloy with 10% SiC composite. The effect of selected process variables on the porosity of 7075 Al alloy 10% SiC composite and subsequent optimal settings of the variables have been obtained using Taguchi method. The results indicate that the holding time, holding temperature and stirring speed are the significant variables. Stirring time is insignificant variable. As the holding time, holding temperature and stirring time increases the porosity decreases. When the stirring speed increases, porosity increases. The predicted optimal value of porosity is 4.71%.

Keywords: stir casting; Taguchi methods; porosity; optimisation; composites; holding time; holding temperature; stirring speed; stirring time.

DOI: 10.1504/IJMATEI.2009.024031

International Journal of Materials Engineering Innovation, 2009 Vol.1 No.1, pp.116 - 129

Published online: 24 Mar 2009 *

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