A laser beam oscillation method using Galvano mirrors, which allows wide weld beads and controls thermal stress distribution, was suggested to suppress the formation of solidification cracks in laser welds. In order to understand the solidification cracking behavior in relation to the bead shape, laser beam oscillation welding was performed under various oscillation widths and frequency conditions. To evaluate the effect of the oscillation parameter on solidification cracking susceptibility, a regression analysis based on the shape of the bead was performed. Stress distribution generated during the laser beam oscillation welding process was also analyzed using finite element modeling simulation. From the results, it was demonstrated that a high shrinkage stress field at the bottom of the partial penetrated bead suppresses the solidification cracking.

中文翻译：

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热裂纹敏感性在具有部分穿透接头的6XXX铝合金上进行激光束振荡焊接

为了抑制激光焊缝中凝固裂纹的形成，有人提出了使用Galvano镜的激光束振荡方法，该方法允许焊缝宽且控制热应力分布。为了了解与焊缝形状有关的凝固裂纹行为，在各种振荡宽度和频率条件下进行了激光束振荡焊接。为了评估振动参数对凝固裂纹敏感性的影响，进行了基于焊缝形状的回归分析。还使用有限元建模仿真分析了激光束振荡焊接过程中产生的应力分布。从结果来看