Impact behaviour and Micro structural analysis of AISI 316 L stainless steel weldments

The effect of filler metals such as austenitic stainless steel (308L) and duplex stainless steel (2209) on impact behaviour of the gas tungsten arc welded austenitic stainless steel (316L) was investigated. Rolled plates of 3mm thickness were used as the base material for preparing single ‘V’ butt welded joints. Pendulum type impact machine was used to evaluate the impact behaviour of the welded joints. From this investigation, it was found that the joints fabricated by austenitic stainless steel filler metal showed superior toughness compared to the joints fabricated by duplex stainless steel filler metal. The welded fracture morphology was studied using scanning electron microscope.