Outstanding features of high-speed hybrid laser-arc welding compared to high-speed laser welding of AA5059 aluminum alloys

This study compares high-speed laser welding (HS-LW) and hybrid laser-arc welding (HS-HLAW) of AA5059. In both cases, the welding speed of 7 m/min promotes the least Mg evaporation and an over than 95% increase in strength comparing to the strength of the initial alloy. However, the porosity of the HS-HLAW welding joint is minimal (0.02%) and its grain size is finer than that of the HS-LW welding joint. The microhardness of the HSHLAW is similar to that of the initial alloy, and HS-LW causes an increase in microhardness.

Automated summary

This study compared high-speed laser welding and hybrid laser-arc welding of AA5059 aluminum alloy, finding that at a certain welding speed, the hybrid laser-arc welding joint had less porosity and finer grain size, while high-speed laser welding increased microhardness.