Wire Electric Discharge Machining Studies on Aluminium MMC Reinforced with Silicon Nitride

P. Paranthaman and N. Sathiesh Kumar

The aim of the present investigation is to study the non-traditional machining characteristic of Aluminium based MMC reinforced with silicon nitride and boron nitride in wire electric discharge machining. In order to develop a high performance metal matrix composite, silicon nitride is chosen as reinforcement medium in Aluminum 6061 matrix. The methodology selected for developing the MMC is stir casting and the weight percentage of silicon nitride is varied from 3 to 12% at an equal interval of 3%. WEDM experiments were designed through Taguchi method with current and pulse ON time along with silicon nitride % as input process parameters and surface roughness as response variable. The results exposes that the addition of hard ceramic reinforcements greatly affects surface roughness of the Al MMC during WEDM as that of traditional machining process followed by current and pulse ON time. Further it is also found that the minimal current and pulse ON time gives the better machined surface.

Volume 11 | 12-Special Issue

Pages: 1227-1232

DOI: 10.5373/JARDCS/V11SP12/20193329