Experimental Study and Optimization of Input Parameters on Fibre Laser Micromachining of Inconel 718

Nickle alloy are super alloys and plays a very important role in engineering applications in the area of advanced structures and technologies for aerospace and power industry, medical science, nuclear and defense equipments, owing to its unique combination of physical, chemical and mechanical properties such as high strength and stiffness at elevated temperatures , high corrosion resistance, fatigue resistance, high strength to weight ratio and ability to withstand moderately high temperatures without creeping. The conventional cutting methods not only face difficulties for cutting these alloys due to their poor thermal conductivity, low elastic modulus and high chemical affinity at elevated temperatures but also undergo from higher cost associated with the machining of Inconel 718 caused by lower cutting speeds and shorter tool life. The present research work deals with fibre laser micromachining on Inconel 718 of 0.5 mm thickness in atmospheric condition with different parametric combinations such as power, frequency and marking speed.