EFFECTS OF LASER SHOCK PROCESSING ON MATERIAL'S PROPERTIES
(National Laboratory of Plastic Forming Simulation and Die & Mould Technology; Huazhong National Laboratory of Laser Technology; Huazhong University of Science and Technology; Wuhan 430074)
Abstract: The effects of laser power density on the mechanical properties of the LY12CZ aluminum alloy(including surface hardness and fatigue strength) were described. The results showed that with the increase of the laser power density, the materials hardness and fatigue strength increased. By microscopic analysis, the microstructures of the shocked and unshocked materials were compared. In addition, the building up of the shocked wave was studied and explored.
Key words: laser shock processing(LSP) fatigue strength power density shock wave(stress wave)