Published Paper Details:

Aluminum alloys have different applications (e.g. Al 5083 and Al 6082: marine, automotive and aeronautical components). Regarding the application, it is necessary to check the poor weldability of the conventional connection in which two aluminum alloys are connected in the liquid state due to the different chemical, mechanical and thermal properties of the connected material and the formation of hard intermetallic growths. Great brittleness occurs, which leads to a reduction in the mechanical strength of the connection. Feasibility of friction stir welding (FSW) of Al 5083 and Al 6082 sheets with different pin profiles: straight cylindrical (Cy), threaded cylindrical (Th), triangular (Tr) and square (Sq) are studied, as cylindrical and threaded cylindrical generate regular stirring action whereas, triangular and square pin profiles produce pulsating stirring action in the flowing material due to their flat faces. Further investigations are underway to determine the effects of these tools pin on the microstructure, hardness, crystallographic structure, and tensile strength of the bonded specimens. All samples showed the lowest hardness value in the heat-affected zone on the side of AA 6082, and this zone also fractured during the tensile tests. Since all samples have comparable microstructures and hardnesses, only the threaded cylindrical sample has the lowest tensile strength because the heat-affected zone has the largest structural component in the tensile direction.