Here we propose an effective method to suppress the interface reaction between Al and Mg using Ti as interlayer and improve the uniformity of interface layer by laser-arc hybrid welding via beam oscillation. With the optimized oscillating frequency of 90 Hz, the Ti interlayer was uniformly melted to form an Al–Mg–Ti ternary system at the interface, which reduced the formation of brittle Al₃Mg₂ and Al₁₂Mg₁₇ and benefited to improve the shear force of lap-welds up to 3.3 kN. The beam oscillation not only avoids the local unreaction or over-reaction at the interface by homogenizing the laser energy distribution, but also increases the effective connection width of interface layer by enlarging its melting range, which significantly strengthens the weld.

在此，我们提出了一种有效的方法，该方法通过束流激光-电弧混合焊接来抑制以Ti为中间层的Al和Mg之间的界面反应，并提高界面层的均匀性。通过优化的90 Hz振荡频率，使Ti中间层均匀熔化，在界面处形成Al-Mg-Ti三元体系，从而减少了脆性Al ₃ Mg ₂和Al ₁₂ Mg _{17的形成。}并有助于将搭接焊缝的剪切力提高到3.3 kN。光束振荡不仅通过均匀化激光能量分布避免了界面处的局部未反应或过度反应，而且还通过扩大其熔化范围来增加了界面层的有效连接宽度，从而显着增强了焊接性能。