Effect of transverse magnetic field on microstructure and mechanical properties of Ti-6Al-4 V manufactured by Laser-MIG hybrid welding

In this study, an external transverse magnetic field was used to assist laser-metal inert gas (MIG) hybrid welding of Ti-6Al-4 V (TC4). The microstructure and mechanical properties, such as microhardness tensile properties the weld joints, under (EMF) a reference joint without EMF were investigated. results showed that laser-arc interaction zone (LAIZ) heat-affected (HAZ) expanded, laser fusion (LFZ) (FZ) changed with application EMF, resulting in change distribution microhardness. FZ comprised Widmanstatten ??-grains primary boundary ?-grains EMF. After applying diameter globular decreased by 38.6%, from 78.4 48.1 ?m, small amount residual dot-like appeared joint. seam improved significantly EMF; average increased 9.7%, failure strain stress specimens 45.6% 6.6%, respectively, owing solid solution strengthening finer ?-grain boundary. addition, mixed fracture mode observed on surfaces. This study revealed elementary laser-MIG welded TC4 correlated heat input