Author : Bharat B. Satapathy 1
Date of Publication :22nd February 2018
Abstract: Laser drilling is a popular non-traditional machining process for the production of large numbers of cooling holes of various sizes (<1mm) and angles in modern aerospace gas turbine components such as turbine blades, nozzle guide vanes, combustion chambers and afterburners. The rate of production of micro-hole (i.e. productivity) is very high but the quality of hole (such as straightness, circularity and HAZ etc.) is very poor due to unique nature of the process. In the present study, first, a set of experiments have been conducted using Taguchi’s L9 orthogonal arrays on a medium carbon steel specimen. Subsequently, different quality parameters (i.e. circularity, HAZ, aspect ratio and spatter deposition) of the micro-hole were measured through SEM.