Analysis of Prior Ultrasonic Impact Peening Treatment on Fatigue Behaviour of AA6063-T6

Abstract

The mechanical and fatigue – ultrasonic impact peening interaction of AA6063-T6 were examined at room temperature (RT). This aluminum alloy is typically used in aerospace structural components such as wing spores of aircraft. The experimental results of un peened and peened samples were compared in both mechanical and fatigue tests. It was observed that the ultrasonic impact peening (UIP) treatment influenced the mechanical fatigue life and fatigue strength due to strain hardening of the surface and to the high compressive residual stresses. It was revealed that the improvement percentage (IP) due to application of (UIP) is recorded to be 6.8 for (UTS), 5.9 for (YS) and 6.25 for elongation. While for fatigue strength the IP was obtained to be 2.77. A comparison of the results was made with other researchers and the comparison was satisfactory