Experimental Study and Modeling of Gas Metal Arc Welding Process to Produce 5083-O Aluminum Alloy Butt Joint

The proper modeling of welding processes and process parameters is very important to attain good mechanical properties of welded joint, which are directly or indirectly controlled by a number of welding parameters. A number of methods are suggested by researchers to model the fusion welding process. Among them Response Surface Methodology (RSM) is popularly used. In this research work, a statistical modeling of the gas metal arc (GMA) welding of 5083-O Al-alloys was done using RSM. The analysis considered three levels of three factors (welding current, voltage & gas flow rate) and two responses (tensile strength and weld hardness). The experimental design was based on central composite rotatable design with full replication. The results indicate that the proposed models predict the responses adequately as the percentage of error is in good agreement.