Tungsten Inert Gas (TIG) welding was performed on Ti-6Al-4V using pure titanium Grade-2 wire as filler material. The important welding parameter that is welding current was varied and other two parameters were maintained at a constant value. About 100 and 110 amps with 40 volt of welding current with welding speed of 0.5 mm/s was maintained. The optical microscopy carried out on the samples exhibits the occurrence of α +β phases in the base metals and needle like structure in the weld metal. The mechanical properties of the welded samples were established by conducting Rockwell hardness assessment and tensile test. The samples were processed and that produces maximum yield strength of 340 Mpa and ultimate tensile strength of 386 Mpa respectively. In the welded area, the hardness value of RC 45 was located. During welding and solidification process, the hardness range raises up and that indicates the absorption of oxygen.
Volume 11 | Issue 12