Abstract—In Gas Metal Arc Welding (GMAW) process, one of the main goals is to reach minimum width of Heat affected Zone (HAZ) as a characteristic of quality. A five level five factor rotatable central composite design was used to collect the data for width of HAZ. After collecting the data, the regression equation of width of HAZ was obtained as a function of wire feed rate, welding voltage, nozzle-to-plate distance, welding speed and gas flow rate using least squares method. Then the cost function (width of HAZ) was minimized by using the Imperialist Competitive Algorithm. The computational result demonstrates that the proposed optimization algorithm is quite effective in minimizing the cost function. The result shows that in order to obtain lower width of HAZ, wire feed rate and welding voltage must be at their lowest levels while nozzle-to-plate distance, welding speed and gas flow rate should be at their highest levels.
Index Terms—Gas Metal Arc Welding (GMAW), width of HAZ, Characteristic of Quality, Rotatable Central Composite Design, Imperialst Competitive Algorithm.
M. Aghakhani is with the Department of Mechanical Engineering, Faculty of Engineering at the University of Razi, Kermanshah, Iran (phone: +988314274535-8; fax: +988314283263; e-mail: aghakhani@razi.ac.ir).
Maziar M. Jalilian is with Department of Mechanical Engineering, Faculty of Engineering at the University of Razi, Kermanshah, Iran(e-mail: maziar.1986.2000@gmail.com).
M. Mehdiabadi is with Department of Mechanical Engineering, Faculty of Engineering at the University of Razi, Kermanshah, Iran(e-mail: M.mehdiabadi@hotmail.com).
Mahyar M. Jalilian is with Department of Chemical Engineering, Faculty of Engineering at the University of Razi, Kermanshah, Iran(e-mail: mahyar390625@gmail.com).
A. Karami is with Department of Mechanical Engineering, Faculty of Engineering at the University of Razi, Kermanshah, Iran(e-mail: alimohammad.karami@yahoo.com).
Cite: Masood Aghakhani, Maziar Mahdipour Jalilian, Mohammad Mehdiabadi, Mahyar Mahdipour Jalilian, and Alimohammad Karami, "Application of Imperialist Competitive Algorithm in Optimizing the Width of Heat Affected Zone in GMAW Process," International Journal of Modeling and Optimization vol. 1, no. 3, pp. 221-225, 2011.
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