When laser power density is greater than 18 GW/cm~2,residual stresses of EBW line are changed,which improves residual stress distribution.

• 当激光冲击的功率密度大于18 GW/cm2时,激光冲击强化处理使电子束焊缝区的残余应力改变明显,改善了焊缝残余应力的分布;