Search

FSSW is a solid state joining method gained its significance as an alternate welding technique in the in electrical, electronic and automobile industries that used FSW welding. FSSW can be used to welding dissimilar joints of material with variation in metallurgical and mechanical characteristics. In this paper, dissimilar welding joints of aluminum alloys (5052) and pure copper (10100) with a thickness of 1.67 mm were welded by FSSW. The variation of rotational speed, dwell time and filler content have been used. The welding joints has been examined by tensile shear test. The scanning electron microscope SEM and X-ray diffraction are used to investigate the hook and intermixing layer characteristics. It was found the best welding condition is (1400 rpm) and (30 sec) which the joint is possess the tensile shear force (3340 N). Adding ZnO filler led to increase the thickness of the copper hook, and expanding the stir zone (weld width bond). Joints with V2-ZnO have highest thickness of intermixing layer (IM), length of weld width bond and best tensile shear force (4300 N).

FSSW is a solid state joining method gained its significance as an alternate welding technique in the in electrical, electronic and automobile industries that used FSW welding. FSSW can be used to welding dissimilar joints of material with variation in metallurgical and mechanical characteristics. In this paper, dissimilar welding joints of aluminum alloys (5052) and pure copper (10100) with a thickness of 1.67 mm were welded by FSSW. The variation of rotational speed, dwell time and filler content have been used. The welding joints has been examined by tensile shear test. The scanning electron microscope SEM and X-ray diffraction are used to investigate the hook and intermixing layer characteristics. It was found the best welding condition is (1400 rpm) and (30 sec) which the joint is possess the tensile shear force (3340 N). Adding ZnO filler led to increase the thickness of the copper hook, and expanding the stir zone (weld width bond). Joints with V2-ZnO have highest thickness of intermixing layer (IM), length of weld width bond and best tensile shear force (4300 N). [ABSTRACT FROM AUTHOR]

Abstract Microstructure of 5052 + Er alloy at continuous casting, hot-rolled, cold-rolled and annealed state were observed, studied the effect of annealing on the microstructure, mechanical properties and forming properties of the alloy, and explored the mechanism of its action. The results showed that, when the annealing temperature is between 340 °C and 360 °C, the tensile strength and yield strength of the 5052 + Er alloy have a large decline while the elongation increase obviously; The recrystallization starting temperature of the alloy is 320 °C, and recrystallization ending temperature is 320 °C; The average strength ratio of the 5052 + Er alloy with 360 °C annealing for 2 h is 0.592, when the average strain hardening exponent is 0.3882, which shows the alloy has good ductility and formability; the second Al3Er phase with the size about 20–30 nm has the coherent/semi coherent relationship with the matrix, which can play an inhibitory role of recrystallization. [ABSTRACT FROM AUTHOR]

Rotating tool spot joining in low rotating speed range is investigated in this study. Torque of the motor increased with the decrease in rotating speed of the motor. Joint strength increased significantly with the decrease in rotating speed. Shoulder plug fracture was observed as a characteristic fracture mode under the long joining time and low rotating speed joining conditions and it obtained the large plastic deformation. The rotational motion of the joining interface was similar with the Rankin vortex. The relationship between the joining interface deformation by the external force and the plastic deformability by the friction heat on this joining process was considered from the experimental results. [ABSTRACT FROM AUTHOR]