Multi-Objective Optimization of Complex Thermo-Fluid Phenomena in Welding
Agegnehu Atena

Abstract
This work is to investigate optimization of Gas metal arc welding (GMAW) by employing Multi Objective Optimization method. GMAW is a process that joins pieces of metal by heating them with an electric arc. The heat of the arc melts the surface of the base metal and the tip of the electrode. The electrode molten metal is transferred through the arc to the molten base metal to form the weld pool. The quality of the weld pool is characterized by the penetration depth, the bead height and width. These characteristics are controlled by a number of welding parameters. The subject of this paper is to establish the welding parameters that yield a weld pool which has a predefined geometry. The approach to this goal is by casting the problem of optimization of GMAW in the framework of Multi–Objective Optimization.

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