Electrode stick and expulsion are the most common defects in RSW of Mg alloy, which are caused by the local overheat at the interface of electrode-workpiece and workpiece-workpiece.

• 电极粘附和焊接喷溅是镁合金点焊中最常见的缺陷，产生的主要原因是电极与工件以及工件与工件界面处局部过热造成的。