Prediction of grain growth in hybrid welding HAZ of TCS stainless steel

Abstract

According to the formula of grain growth under isothermal condition, the kinetics equation of ferritic grain growth in heat affected zone (HAZ) was obtained, which was combined with the calculated thermal cycles to predict the grain growth in HAZ of TCS stainless steel under the new-type welding procedure-hybrid welding. The grain sizes in HAZ of TCS stainless steel have been calculated for three welding conditions. Simulation results are validated by the average grain sizes measured on the metallographic images of the welding joint of TCS stainless steel. Preliminary discussion has been made on correlation of the grain growth with the thermal cycles and the effect of local variation in thermal cycles on the grain growth. © Rright.