Finite-element study of residual stress distribution in Ti-6Al-4V alloy treated by laser shock peening with varying parameters

Laser shock peening (LSP) is used to enhance surface quality of the metallic structures by generation compressive residual stresses on it. This work studies effect main LSP parameters stress fields finite-element method. The specimen under investigation a square plate with thickness 3 mm made Ti-6Al-4V. performed analysis enhances understanding application manufactured from this material and information can be useful for choice optimal parameters. spot size shape, pulse energy, number peen layers, overlapping spots temporal variation mechanical pressure induced plasma considered analyzed. A 3D model based Johnson-Cook constitutive relation developed verified results measurements LSP-treated samples different conditions. From obtained following conclusions drawn: energy provides more significant although resulting profile tends some saturation curve; shape its total duration also substantially alter field; least parameter shape.