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An Investigation Of The Residual Stress Characterization And Relaxation In Peened Friction Stir Welded Aluminum–Lithium Alloy Joints, Omar Hatamleh, Iris V. Rivero, Shayla E. Swain
An Investigation Of The Residual Stress Characterization And Relaxation In Peened Friction Stir Welded Aluminum–Lithium Alloy Joints, Omar Hatamleh, Iris V. Rivero, Shayla E. Swain
Iris V. Rivero
In this investigation the residual stresses generated from friction stir welded (FSW) 2195 aluminum–lithium alloy joints were characterized. The results derived from this research revealed significant levels of tensile residual stresses at the surface and throughout the thickness of the FSW samples. Furthermore, residual stress relaxation at the surface and throughout the thickness of the samples was assessed for laser peened friction stir welded aluminum–lithium joints. To do so the samples were cycled several times at a constant amplitude load. The results indicated that most of the relaxation for the surface residual stresses took place during the first cycle of …