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Influence of the welding parameters on the heat affected zone for aluminium welding

Meseguer-Valdenebro José L. (University Center of Defence at the Spanish Air Force Academy, MDE-UPCT, Santiago de la Ribera, Spain)
Martínez-Conesa Eusebio J. (Technical University of Cartagena, Faculty of Architecture and Building Engineering, Cartagena, Spain)
Serna José (University Center of Defence at the Spanish Air Force Academy, MDE-UPCT, Santiago de la Ribera, Spain)
Portoles Antonio (Technical University of Madrid, Department of Materials, Madrid, Spain)

This work analyzes the Heat Affected Zone in an aluminum alloy welded assembly using the Metal Inert Gas welding technique. Making use of numerical simulations of the involved thermal processes, the aluminum alloy cooling curve is calculated and the extension of the Heat Affected Zone is evaluated. The connection between this last parameter, the cooling rate, and the maximum obtained temperature is assessed. Additionally, the response surface method is exploited to fit the dependence of the Heat Affected Zone with the welding parameters and to optimize these parameters in order to minimize that region.

Keywords: Heat Affected Zone, Aluminum Welding, Numerical Simulation, Cooling Time, Response Surface Method