STUDY ON THE MECHANICAL BEHAVIOR OF ALUMINUM ALLOY 5083 FRICTION STIR WELDED JOINT

摘要

The mechanical behavior of friction stir welded joints made of aluminum alloy 5083- H111 was studied in this investigation. Different welding processes parameters (rotational speeds, travelling speeds and tool pin shapes) were used to investigate the effect of process parameters on the strength and fracture properties of the joint. Scanning electron microscopy and optical microscopy analysis were conducted to study the effect of friction stir welding FSW process on the grain size in the welding zones. In general, the results illustrated that tool profile, the rotation speed and the traveling speed has great effect on the strength of the welded joint. Scanning electron microscopy and optical microscopy investigations showed that the grains inside the welding zone was refined and equiaxed resulting in higher hardness inside the nugget.