Abstract
Micro drilling is an advanced and precise process of producing down scale holes on various work materials. The superalloys play a major role in the present developing engineering field because of their predominant properties at a higher temperature. In this work micro drilling operations are conducted on Incoloy 800, superalloy at higher speeds using untreated and cryogenically treated drill bits to analyze the effect on response parameters such as material removal rate, surface roughness, thrust force and temperature. The experiments are executed by considering tool diameter, feed and speed of the spindle as the process parameters which are varied by three levels as per Taguchi L27 orthogonal array design. The optimized combination of process parameters are obtained by using grey relational analysis.
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