Production and machinability studies of hybrid metal matrix composites using micro ecm

Abstract

Micro-ECM is a nontraditional machining process (NTMP) for machining of difficult materials, Superalloy and metal matrix composites (MMCs). MMCs especially aluminium based MMCs finds applications in automobile, aerospace, marine components and nuclear reactor components. In this research the hybrid AMMCs is developed using magnesium oxide and graphite as reinforcement on Al6063 matrix. The ratio of these materials is aluminium 6063 with 83%, magnesium oxide with 12% and graphite with 5%. The produced hybrid AMMCs is subjected to the mechanical testing such as bending, compression, hardness and wear. newlineIt is evident from the literatures that the machining of micro-hole on Hybrid MMCs is subjected to various input parameters. Each output responses has different optimal process parameters combination and hence pertaining to multiple responses the selection of optimal machining parameter combination are complex. newlineTechnique of Order Preference Similarity to the Ideal Solution (TOPSIS) is a competent multi criteria decision making tool for solving complex problems. Multi objective optimization technique like TOPSIS method is used to overcome or guarantee the result obtained from the other techniques. The micro-ECM process parameters such electrolyte concentration (EC), machining voltage (MV), electrolyte temperature (ET) and duty cycle newline