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描述了激光冲击参数对２０２４－Ｔ６２铝合金疲劳寿命的影响．当激光脉宽为５０ｎｓ时．试件表面产生有害的热损伤，疲劳寿命无显著性差别．当激光脉宽为１３ｎｓ时．试件表面未产生足够的塑性变形，疲劳寿命提高幅度不大．当激光脉宽为３０ｎｓ时，试件表面形成微凹致密的光亮冲击区．疲劳寿命获得大幅度提高，在９５％的置信度下．激光冲击试件的中值疲劳寿命是来冲击试件的４．２～８．１倍．
The impact of laser impact parameters on the fatigue life of 2024-T62 aluminum alloy is described. When the laser pulse width of 50ns. The specimen surface has harmful heat damage, fatigue life no significant difference. When the laser pulse width of 13ns. The specimen surface does not produce enough plastic deformation, fatigue life increase is not significant. When the laser pulse width is 30ns, the surface of the specimen is formed with a micro-concave dense light impact zone. Fatigue life was significantly improved at 95% confidence. The median fatigue life of a laser shock specimen is 4.2 to 8.1 times the impact specimen.