OPTIMIZATION OF PREHEATING CONDITIONS FOR HIGH-QUALITY TUNGSTEN INERT GAS WELDING OF CAST IN-738 SUPERALLOYS
The present work investigates numerically the influence of heating temperature on the thermal and mechanical behaviour of INCONEL 738 LC, which is used in the TIG welding process for castings made from a nickel-based superalloy. The transient heat transfer process is modelled in the ABAQUS solver using the finite element method (FEM) for the volumetric double ellipsoidal heat source model of Goldak, which simulates a welding torch that moves.