Empirical modelling and investigations of process parameters on a super alloy

Fabrication industry is facing a challenging task in joining super alloys as these metals are finding significant applicability especially in aerospace industry due their unique properties. Conventional welding fail to meet the requirements contrarily laser welding has its own constraints for optimum quality welds. The bead geometry play an imperative role in optimizing quality of weld joint. This paper is an endeavor made to generate a empirical model for the preferred critical process parameters for Nd-YAG to join Inconel 825. Design of Experiments matrix was developed to conduct experiments. The Response surface methodology is applied to measure output responses and design expert software is exercised for testing fitness. The R-2 value and probability graphs plotted for adequacy. The graphs were analyzed and models were developed which can be further exercise for optimizing the laser welding process. (C) 2019 Elsevier Ltd. All rights reserved.