Investigation of Advanced Current Characteristics on Expulsion Formation and Characteristics of Resistance Spot Welded Advanced High Strength Steels

Abstract

In this thesis, the experiments with HSLA600 which is widely used in industry will be investigated. Single, double and triple pulse welding will be applied to the materials to obtain the biggest, homogenous nugget geometry without expulsion by increasing the current value step by step. As a final step, joints will be analyzed by macrostructure analysis, the Vickers hardness test, the lap / shear test, and the tensile fatigue test. With this thesis, it is aimed to prevent expulsion while improving the nugget’s quality by using single, double and triple pulse current formation.