A Coupled Thermo-Mechanical-Metallurgical Model Capturing Essential Transformations in the Welding of High Strength Low-Alloy Steels

Abstract: A well-known challenge is to predict the transformations occurring during metal alloys welding aiming control weldment properties. Thus, this study presents a Thermo-Mechanical-Metallurgical model numerically thermal history, solid-state phase transformations, solidification microstructure and hardness distribution after of high strength low-alloy steels. The was implemented in an in-house computational code based on Finite Volume Method, which allowed dynamically track calculate volume fractions ferrite, pearlite, bainite martensite at heat-affected zone, besides formation determination dendrite arm spacing fusion whereas zone calculated by applying mixture rule. For this, single-pass autogenous Gas Tungsten Arc Welding welds were simulated experimentally carried out AISI 4130 steel samples, including their preheating evaluate effectiveness proposed simulate workpieces different initial conditions close agreement between experimental results obtained.