Welding investigation on penetration and mechanical property of AISI 201 during A-TIG welding

Abstract

Abstract Austenitic Stainless Steel has improved mechanical properties and great corrosion resistance thereby it is extensively used in fabrication industries. The aim of our work is to compare the mechanical property and macrostructural of TIG and A-TIG welding process on Nitrogen alloyed stainless steel and find out the best oxide flux to be used before welding to improve the macrostructure, penetration, weld width, and tensile strength of butt joint. Five dissimilar fluxes i.e. SiO2, MnO2, TiO2, ZnO and CaO were used during A-TIG welding. Experiments were performed at same welding speed but at different welding current in both TIG and A-TIG welding. In the whole process SiO2 and TiO2 helps to get full penetration of 5 mm at 200 A welding current while least penetration of 3.16 mm obtained during TIG method. Welding parameters giving the best penetration profile was chosen to perform welding on butt joint for assessment of strength. Test coupon of TiO2 had greater strength (698 N mm−2) as well as percentage elongation (34.5).