Effect of texture on the residual stress response from laser peening of an aluminium-lithium alloy

摘要: Abstract Laser shock peening can improve the damage tolerance of metallic materials by introducing deep compressive residual stress that inhibits crack initiation and growth. This study investigates laser aluminium alloy in a product form – an extruded T-section has different crystallographic textures locations. The studied is Al 2099, aluminium-lithium shows anisotropy mechanical properties when texture present. Specimens extracted from regions extrusion were peened with power density 3 GW/cm2 single shocks as well pattern. Residual stresses characterized primarily using incremental hole drilling. results show 20% higher web area compared to flange after shock, this difference decreasing number increases. effect be explained yield strength between those No significant differences observed onto planes textured sample at given location.