STRESS AND TEXTURE MORPHOLOGY CONTROLLING METHOD FOR PREPARING SUPER-HYDROPHOBIC SURFACE OF ALUMINUM ALLOY BY LASER ETCHING

A stress and texture morphology controlling method for preparing a super-hydrophobic surface of an aluminum alloy by laser etching includes the following steps: pretreating a surface of an aluminum alloy; fixing a pretreated aluminum alloy to an ultrasonic vibration platform, continuously charging flowing liquid nitrogen to a to-be-machined surface of the aluminum alloy, and controlling a flow of the liquid nitrogen to cool the to-be-machined surface of the aluminum alloy and keep the to-be-machined surface of the aluminum alloy at a low temperature; keeping stable flowing of the liquid nitrogen on the to-be-machined surface of the aluminum alloy after the to-be-machined surface of the aluminum alloy is cooled, using the ultrasonic vibration platform to generate a high-frequency ultrasonic vibration field, and etching the to-be-machined surface of the aluminum alloy to form a super-hydrophobic textured micro-nano structure surface; and reducing a surface energy of the super-hydrophobic textured micro-nano structure surface.