Abstract
Laser micro drilling is a non-conventional machining process which uses thermal energy to remove material from the workpiece. This paper presents the parametric study on Nd:YAG laser micro drilling of 2 mm thickness INCONEL 825 plate a Nickel based super alloy which have found purpose in nuclear, aerospace, and production industries due its high strength and resistant to oxidation at high temperature. The present work is to improve the geometrical characteristic like hole taper and hole circularity. Integrated grey Taguchi based Response surface methodology (GT-RSM) was used to predict optimal cutting condition . The effect of process parameters such as air pressure, trepanning speed, frequency and lamp current on the output response hole circularity at entry and hole taper is studied by grey based response surface methodology. Lamp current and air pressure is determined most influential parameter on hole circularity and hole taper.
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