supported by the National Natural Science Foundation of China(51665044);Natural Science Foundation of Inner Mongolia(2019LH05017);Science and Technology Programs of Inner Mongolia(2020GG0313);Major Basic Research Open Subjects of Inner Mongolia Autonomous Region.
Variable polarity plasma arc-gas metal arc welding(VPPA-GMAW)integrates the advantages of VPPA and GMAW,and it is particularly applied to weld thick-plates aluminum alloys.High-speed camera and data acquisition system...