Machining studies on titanium and nickel based super alloys

Abstract

Hard turning is a precise machining operation which imposes strictly on the requirements of both machine tools and machining operation, hard turning is often considered a replacement for grinding operations or as a pre-grinding process. The main advantage of hard turning is the possibility of eliminating grinding operations and it is environment friendly. Researchers have worked upon several aspects related to hard turning, in past few years unprecedented progress has been made in the hard turning, with the development of new cutting tools, the precision and rigidity of machine tools have been improved to allow hard turning to become a feasible process. The materials which requires hard turning are tool steel, case-hardened steel, bearing steel, Titanium, Inconel, Hastealloy, stellite and other unfamiliar strange materials. In manufacturing sectors the manufacturers face two main practical issues related to manufacturing processes and they are, to determine the values of process parameters and to improve the manufacturing system performance. Many authorsThe present research work focus on the experimental investigation and optimization of machining parameters of titanium (Ti-6Al-4V) and nickel (Inconel718) alloy materials. The objective of the research is to evaluate the optimal setting of machining parameters and to achieve the quality of machining. Titanium alloys have good strength to weight ratio and resistance against corrosion. The work material Ti-6Al-4V is often used in the aircraft industry with its low density and excellent corrosion resistance. The research on titanium alloy (Ti-6Al-4V) studies the optimum conditions for machining. A Taguchi orthogonal array is used to design an experimental layout with minimum number of repetitions in the experiments. The machining was carried out on L27 orthogonal array, which is employed to analyze the experimental data and compared with the predicted data from design of experiment. The effect of machining parameters such as speed (1000, 1500, and 2000) in rpm,