The Effect of Process Parameters on the Lifetime of Copper Electrodes used in Spot Welding of Interstitial Free Steel Sheets - Costa, H. R. M.; Dias, J. S.; Aguiar, R. A. A.; Lima, R. A. A.; Lopes, D. M. (Annals of “Dunarea de Jos” University of Galati. Fascicle XII, Welding Equipment and Technology, 2016)