Laser shock peening (LSP) is an effective surface treatment technology to regulate the residual stress and surface profiles of many metallic materials. The micro-indention produced on the metal surface after LSP is an important factor related to the surface profile. In this work, the microindention induced by LSP is investigated with theoretically and experimentally, and the residual stress in the micro-indention is also measured. The results show that the micro-indention is induced in the spot center, whose depth is proportional to the laser power density and laser pulse duration. It saturates with the number of impacts beyond 3. The micro-indention transfers materials in the spot center to the surroundings and induces convex deformation at the spot edge. The trend of the residual stress is similar to that of micro-indention depth. The micro-indention and convex deformation increase the peak-to-valley roughness R z at the edge.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.