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研究了激光冲击处理对２０２４Ｔ６２铝合金疲劳性能的影响。结果表明：激光冲击处理后，铝合金疲劳寿命显著提高、疲劳裂纹扩展速率大大降低。表面粗糙度降低、位错密度增加、表面出现残余压应力和表面硬度提高是激光冲击处理改善铝合金疲劳性能的主要机制
The impact of laser shock treatment on the fatigue properties of 2024 T62 aluminum alloy was studied. The results show that after laser shock treatment, the fatigue life of aluminum alloy is significantly increased, and the fatigue crack growth rate is greatly reduced. Decreasing surface roughness, increasing dislocation density, residual compressive stress on the surface and increasing surface hardness are the main mechanisms by which laser shock treatment improves the fatigue properties of aluminum alloy