Effect of Machining Parameter on Built-Up Edge, Microstructure Alteration and Tool Life during Turning Inconel 718 under MQL

Abstract

Turning is a widely used machining operation when compared to other manufacturing processes. The finished component is subjected to dimensional accuracy, required surface finish and the tool is subjected to less cutting force, minimum possible temperature and maximum tool life. In order to achieve these desired performance measures in any machining operation, proper selection of machining parameters is very essential. The present method of selection of machining parameters of machining parameters by previous work experiences of the process planner and machining handbooks are basically related with lower cutting speed and also without the existence of Minimum Quantity Lubricant (MQL). In any machining process, it is very important to control the cutting variables used during the process because these will affect, for example, tool life and workpiece dimensional control. Since the built-up edge (BUE) increases the wear of the tool and affects the tool life, the study of this phenomenon is very important in predicting and minimizing the wear of a cutting tool and also to get good dimensional control. iii There is a need to find the optimal machining parameters for the desired performance measures in minimum production time and minimum production cost. In this work, effect of machining parameter on built-up edge, microstructure alteration and tool life during turning Inconel 718 under MQL condition are being investigated in order to select the optimal machining parameters such as cutting speed, feed rate and depth of cut in minimum possible production time and production cost on turning process.