Assistant Professor, Department of Mechanical Engineering, Anits Engineering College, Visakhapatnam, Andhra Pradesh, India
Online published on 21 November, 2017.
In this present work numerical simulation of thermal phenomena during welding of 316L stainless steel plate. Different bead-on-plate weld trials conducted on 3 mm thick plate with 120–160 Amp heat input at a different welding velocity from 120–180 mm/min. On the basis of experimental results the influence of welding current and speed on the shape and size of fusion zone in bead-on-plate is compared with simulation. A three dimensional Double ellipsoidal heat source model and temperature dependent thermo physical properties of 316L steel are used for thermo-mechanical analysis of TIG welding in SYSWELD software. Based on bead-on-plate experiment and prediction correlation an optimized parameter for 3 mm thick used for final weld plate. During welding of final weld plate thermal cycles are measured using thermocouple further compared with finite element analysis results. Amount of heat power density distribution is predicted using SYSWELD is compared with analytical density in MATLAB. An isotherm curve distribution in molten zone pool for different weld velocity for a heat input variation is predicted.
316L stainless steel, thermal analysis, Fusion zone, SYSWELD, heat power density, TIG welding
