Table of Contents
Journal of Metallurgy
Volume 2012 (2012), Article ID 624650, 10 pages
http://dx.doi.org/10.1155/2012/624650
Research Article

Mould Filling Ability Characterisation of Cast Aluminium Alloys Using Design of Experiments

1Department of Metallurgical and Materials Engineering, MGIT, Hyderabad 500075, India
2Special Fabrication Division, DRDL, Hyderabad 500058, India
3Mechanical Engineering Department, M.V.S.R. Engineering College, Hyderabad 501510, India
4National Institute of Technology, Trichy 620015, India

Received 23 February 2012; Revised 1 August 2012; Accepted 21 August 2012

Academic Editor: Brij Kumar Dhindaw

Copyright © 2012 Samavedam Santhi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mould filling ability characteristic has been influencing the liquid metal flow, heat transfer, and solidification there by affecting the quality of aerospace castings. Mould filling is a critical parameter in the production of sound and quality castings, especially in the case of complex-shaped castings where section thickness is varying considerably. The mould filling ability of aluminium alloys LM6 and LM25 has been studied in the present investigation. Experimentation has been carried out using orthogonal array experimental layout. The process parameters studied in the present investigation are alloy composition, sand fineness, mould coating, and pouring temperature. The mould filling ability of selected aluminium alloy has been studied using pin test piece with cylindrical cores. The results from experimentation are analyzed to find the influence of the process parameters on mould filling ability. Based on the above, LM6 alloy has been found to have better mould filling ability characteristics and the analysis of variance has also revealed the same optimum factor combination.