Effect of Dual-Sided Laser Peening Modes on Residual Stress Distribution of Aero-engine Titanium Blades

For thin-walled structure components, dual-sided laser peening modes greatly affect surface integrity of the components. In this study, simplified compressor blade made of TC17 titanium alloy was chosen as the studied object. The effect of simultaneous and non-simultaneous dual-sided laser peening on residual stress distributions along surface and depth were studied through numerical simulation. The influencing mechanisms of dual-sided laser peening modes on residual stress distribution along depth were investigated by means of wave propagation theory. This study is instructive in parameter choosing for laser peening of thin-walled structure components based on better understanding the effect of dual-sided laser peening modes on residual stress distribution.