In the present paper, the effects of rotating and welding speed on the mechanical and microstructural properties of Al 6056 butt joints produced by Friction Stir Welding have been analysed. Different welding trials with variable rotating speed of the tool and different welding velocity have been done. The mechanical properties of the welded joints have been evaluated through microhardness measurements (HV) and mechanical tests at room temperature. The fatigue behaviour of the FS Welded plates under constant axial stress amplitude and load ratio R=smin/smax=0.1 has been investigated using a resonant testing machine for all the welded joints typologies used in the present study; the results are processed as function of the welding parameters. The microstructural evolution and grain size of the welded metal for the most interesting welding classes has been studied and correlated to micro hardness strength and the welding velocity by employing optical observations and SEM analysis
Mechanical and Microstructural Properties of Al6056 Friction Stir Welded Joints
CAVALIERE, Pasquale Daniele;NOBILE, RICCARDO;PANELLA, Francesco;
2005-01-01
Abstract
In the present paper, the effects of rotating and welding speed on the mechanical and microstructural properties of Al 6056 butt joints produced by Friction Stir Welding have been analysed. Different welding trials with variable rotating speed of the tool and different welding velocity have been done. The mechanical properties of the welded joints have been evaluated through microhardness measurements (HV) and mechanical tests at room temperature. The fatigue behaviour of the FS Welded plates under constant axial stress amplitude and load ratio R=smin/smax=0.1 has been investigated using a resonant testing machine for all the welded joints typologies used in the present study; the results are processed as function of the welding parameters. The microstructural evolution and grain size of the welded metal for the most interesting welding classes has been studied and correlated to micro hardness strength and the welding velocity by employing optical observations and SEM analysisI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
