激光表面处理对7075铝合金航空实体结构残余应力的影响

Effects of Laser Surface Treatment on Residual Compressive Stress of 7075 Aluminum Alloy Aviation Entity Structure

模拟了不同激光表面处理工艺对7075铝合金航空实体结构残余应力的影响。结果表明,增加激光表面扫描道数,残余压应力值会增加,有利于疲劳性能的提高;但同时随着扫描道数的增加,构件的变形也增大。在实际激光处理过程中,应综合考虑残余应力和变形的效果。

The effect of laser surface treatment on residual compressive stress of 7075 aluminum alloy aviation entity structure was studied. The resuslt show that residual compressive stress value increases and the fatigue performance improves with the increase of the number of laser surface scan way, but the component deformation increases. In the actual process of laser processing, the effect of residual stress and deformation should be considered synthetically.