Experimental Analysis on Fatigue Life Assessment of Dissimilar Aluminum Alloys Weld Joints under Four-Point Rotating Bending Condition

Industrial applications often require welded joints of dissimilar metals to perform reliably under adverse working conditions. Such conditions demand high resistance failure modes, such as fatigue, corrosion, and creep. In involving intense vibrational cyclic loading conditions, strength-to-weight ratio metals, including aluminum, are more vulnerable fatigue failure. This study investigates the strength base tungsten inert gas two most widely used aluminum alloys, AA7075 AA2024, four-point rotating bending. For comparative study, these alloys were joined together by using different filler rods, AA4047 AA4043, similar welding SN curves for all samples generated through experimental iterations. A comparison results shows that have better than while, a filler, has fracture AA4043.