Fatigue and Fracture Behaviours of FSW and FSP Joints of AA5083-H111 Aluminium Alloy

摘要

This research study's the fatigue behaviour of friction stir welded (FSW) and friction stir processed (FSP) joints for joining AA5083-H111 aluminium alloy. The Joining has been implemented on 3mm thickness. Fatigue properties of the welded joints were evaluated based on the superior tensile properties for FSW at 1500 rpm and a feeding speed of 20 mm/min. the FSP was at 1500 rpm and a feeding speed of 40 mm/min. Fatigue alternating bending test was performed at a constant stress amplitude cantilever with fully reversed (R=-l). The fracture surface topography was also analyzed by the aid of an electron microscope. The experimental fatigue properties for base , FSW & FSP welds of AA 5083-H111 aluminium alloy that were obtained from the experimental work showed that all the tested samples of FSP displayed good fatigue behaviour and better fatigue properties near to base material than what the FSW were. The endurance limits were 81 MPa and 71 MPa for FSP and FSW joints respectively and 87 MPa for base metal.