Consistent thermo-mechano-metallurgical model of welded steel with unified approach to derivation of phase evolution laws and transformation-induced plasticity Original Research Article

Coupled electromagnetic, thermal, mechanical, and metallurgical processes occur in the heat affected zone (HAZ) during welding. Metallurgical processes: melting, solidification and solid phase transformations are at the heart of this manufacturing technique. The modern approach to modelling of welding leads to phenomenological description of the complex thermo-mechano-metallurgical (TMM) process and finite element (FE) solution of this problem. Such a model requires the new and unified approach to derivation of evolution equations for solid phase transformations and the formulation of mathematically consistent and coupled TMM problem. Results of this numerical simulation are shown for two simple welding benchmark problems formulated for two thick plates.