Laser peening is an innovative surface treatment technique, and can significantly improve the mechanical performance of metallic components. To investigate the fatigue life of Ti17 titanium alloy by laser peening, laser peening experiment was undertaken using Nd:YAG laser system with the pulse-width of 15ns and max pulse-energy of 7J. Firstly, the mechanical properties and microstructure with different laser peening parameters were investigated, which were measured and observed by Vickers indenter, X-ray diffraction, scanning electron microscope and transmission electron microscope.

Snake-like robot can move in a variety of environments, like the flat ground, grass, forests, swamps, underwater and so on, in which the driving force of snake-like robot comes from the interaction between the body and the environment. Hence, the research on the interaction between the robot and the environment has a significant importance to the control of snake-like robot.