M Hari Prasad
P. Venkataramaiah
Abstract
The present work has been done in three stages. In the first stage AA 6101- B4C /Se/CNT hybrid aluminium metal matrix composite(HAMMCs) samples are prepared with different combinations of reinforcement materials with fixed weight ratio and tested its properties viz. hardness, corrosion resistance, wear resistance, tensile strength, flexural strength, impact strength and electrical conductivity. The best material which possesses all these good properties is selected among the developed composites by analysing the data of the characteristics using AHP-GRA, in the view of reduction of experimental cost and time. In the second stage, Set-I experiments are conducted on selected composite according to Taguchi experimental design (OA9) for different parameter combinations. Further machining outputs are studied by analysing them through GRA-Taguchi method and optimal processes parameters are selected. Confirmation tests are used to validate these results and the order of influence of process parameters on machining outputs is determined through analysis of variance. In third stage, Set-II experiments are conducted on selected composite. Again machining outputs are analysed and optimal processes parameters are selected. This parameter selection methodology will be useful to increase the rate of production and the quality of items produced with the WEDM process
Keywords- HAMMCs, AA6101, stir casting, Analytical Hierarchy process, Grey relational analysis, Analysis of variance