Friction Stir Welding is the most remarkable welding technology that has been invented and developed in last decade. It made it possible to join a number of light metals that were previously believed difficulties to get reliable welds without defects including distortion. This comparatively recent innovation has permitted friction technology to be used to produce continuous welded seams for plate fabrication, particularly in light alloys. This work tried to clarify the motion of metal using different aluminum plate compositions which contain different Mg contents and to estimate heat input. Metallurgical observation reveals that push angle of stir tool affects the metal flow patterns which include two direction flows. One is the bottom flow and second is surface flow. Vertical tool angle has effected the location of assemble point of both flows. Increment of push angle made the points upwards or outside of plate surface. This flow might be effective vanishing defects. The consolidated weld material is thus free of typical fusion welding defects.
展开▼
