THERMOMECHANICAL SIMULATION OF HEAT AFFECTED ZONE IN A NITROGEN CONTAINING AUSTENITIC STAINLESS STEEL

Abstract

Ihe objective of' dissertation is to study the influence of welding parameters like heat input. welding speed. heating rate, holding time, cooling rate on microstructure and mechanical properties in the heat affected zone region by thermomechanical simulation. Here nitrogen containing austenilic steel is subjected to different thermal cycles. 'l'hcsc therrno mechanical cycles may (deliberately or not) alter the mechanical properties of the steel. To have a more indepth and quantitative understanding of the effects of the thermo-mechanical cycles at a lab Ir scale. Glceblc tests can be performed. The present study deals with heat affected zone (llAZ) simulation of nitrogen containing austenitic stainless steel using a thermo mechanical simulator. Gleeble® 3800. I-lAZ simulation helps in identifying suitable welding parameters like heating rate, cooling rate, peak temperature, and energy input to the welding process for a given material for ensuring desirable mechanical properties, tensile strength. ductility and toughness in welded parts.