Investigation on metal transfer and deposition in micro-plasma arc freeform fabrication controlled by local alternating magnetic field

Variations of the improved characteristics on microstructure and mechanical properties of Al–Cu alloy fabricated by magnetic field assisted wire-arc additive manufacturing after heat-treated

“…Zhou et al [17] reported that the introduction of an appropriate external transverse magnetic field could improve the condition of arc plasma in the WAAM process. Qv et al [18] took an external alternating magnetic field to assist micro-plasma arc-directed energy deposition to control the position of the liquid bridge during droplet transition, further control heat input and dynamically control the metal transfer. Zhao et al [19] reported that the introduction of an external magnetic field during WAAM of Al-Mg alloy promoted convection and thus broke up dendrites and precipitates under the effect of electromagnetic stirring.…”