Parametric Optimization in the Laser Cutting of Titanium Alloy Sheet (Grade-II)

Abstract

Due to increase in the consumer’s needs and requirement, the material science engineers are trying to develop the different advanced material, superalloys, and composites. These materials are predominantly used in many latest industries such as aircrafts, marine, chemical, and automobiles. Such types of applications require the complex profiles and precise cuts with high quality which may not be possible to found by using the conventional cutting methods in these materials. These objectives may be fulfilled by using another class of machining processes called advanced machining process. The main objective of this study is to model and optimize the bottom kerf width and bottom kerf deviation in the Nd: YAG laser cutting of titanium alloy grade–II. For modeling and optimization, the experiments have been performed by using L27 orthogonal array. The experimental data have been used to develop the second-order models of kerf width and kerf deviation. The statistical analysis shows that these models have been found reliable to predict the different quality characteristics during the process. Finally, the optimum predicted results have been confirmed by using the experimental data at optimum parameters settings. These results are found in good agreements with optimum predicted results as the confirmation experiments as the bottom kerf width and bottom kerf deviation are reduced from 0.3408 mm and 0.0740 mm to 0.33693 mm and 0.06871 mm, respectively.