Authors: S Singh M F Yeh
Publish Date: 2011/04/19
Volume: 21, Issue: 4, Pages: 481-491
Abstract
Abrasive powdermixed electrical discharge machining APMEDM a hybrid manufacturing process involving the use of a dielectric fluid mixed with abrasive powder combines the benefits of mechanical and thermal interactions The aim of this article is to use a new approach of performance evaluation gray relational analysis GRA to evaluate the effectiveness of optimizing multiple performance characteristics of APMEDM of 6061Al/Al2O3p/20p aluminum matrix composites AMCs The considered process parameter includes the seven control factors namely pulse current A pulse ON time μs duty cycle gap voltage V time interval of tool lift s abrasive powder concentration g/L abrasive particle size μm and a noise factor aspect ratio shape of tool electrode The combination of L18 21 × 37 orthogonal array design of experiment with GRA enables to determine the optimal parameters for multiple responses GRA is used to obtain a single performance index gray relational grade through gray relational coefficient to optimize the APMEDM process with lower tool wear rate surface roughness and higher material removal rate In addition analysis of variance ANOVA for the GRC is also utilizedThe authors acknowledge all who have contributed to this article through their research papers comments and documents The authors are extremely grateful and wish special thanks to Dr Sachin Maheshwari Professor Head MPAE NSIT Dwarka New Delhi The authors are also indebted to Prof P C Pandey ExProf Head IIT Roorkee India for being kind enough to provide literature support and words of advice
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