Interface Formation Induced by Friction Stir Welded Tool Offset in T-lap Joint of AA7075 and AA5083
摘要
The goal of this work is to reveal the interface formation of T-lap joint of AA7075/AA5083 induced by friction stir welded tool offset. The distance from the tool axis to the center of the T-joint was defined as the tool offset. The results verified that the welding interface included kissing bond (KB) defects was significantly sensitive to the eccentric position of tool pin. Increasing the tool offset decreased the KBs at advancing side but increasing the KBs at retreating side. The influence of this type of defects on the joint tensile strength was evaluated in digital image correlation (DIC) technology.