Study of the Microstructure and Properties of the Butt Joint of Laser-Welded Titanium Alloy with Flux-Cored Wire

A self-developed Ti-Al-V-Mo system titanium alloy flux-cored wire was used to join the Ti64 plate via laser welding with filler wire. The microstructure and properties of obtained welded joint were investigated. results showed WM (welded metal) consisted mainly acicular α’ martensite, HAZ (heat affected zone) comprised a primary αp phase, Widmanstatten, few martensite residual β phase. strength elongation after breaking are equivalent that BM (base metal). tensile fracture, presenting as microvoid coalescence ductile encompassed by massive shear lips deep uniform dimples. overall microhardness sequenced > BM. In WM, large-angle grain boundaries intragranular misorientation greater than 15° accounted for about 84%. By XRD, it discovered composed modest amount extremely weak multi-angle α phase diffraction peak. test designed method filling is suitable high-quality plate.