Incidence 0f the friction-stir welding process parameters of aluminum alloy

Abstract

Hardness and the microstructural variations were established in an AA 1050 series aluminum alloy subjected to friction stir weld. The design of the tool used consisted of a concave shoulder and threaded conical pin combination. Sheets metals were perpendicularly cut; lamination direction 180 mm long and 80 mm wide with 5 mm thickness, they were joined in series of two sheets along by drawing 170 mm weld seams. From a small grains structure and a continuous network of fine particles in α-phase matrix with equiaxial grains, after welding, the affected thermo-mechanical zone shows a reorientation, with some recrystallization degree and the presence of re-precipitated eutectic silicon particles in the affected thermal zone.

Keywords

• microstructures
• friction stirring
• conical pin
• affected thermo-mechanical zone.