Pareto optimization of TIG welding process for joining the bell metal

The bell metal parts are joined by riveting and brazing, which are not well accepted. The industry, therefore, has a high demand for suitable joining techniques. In this study, TIG welding process was used for joining the bell metal parts. The regressions equations between the welding input parameters and weldment qualities have been obtained based on the response surface method (RSM). The regression models were solved by using multi-objective optimization algorithm. Then using the Pareto optimal front, different sets of optimized TIG welding parameters have been recommended for producing the bell metal weldments for various applications. Again, the mechanical properties and microstructure of the bell metal weldments at optimized conditions have been investigated. The result shows that the TIG welding process has the capability to successfully produce the bell metal joints. It is expected that this study will open up new market avenues for the industry.