Modeling of Thermophysical and Mechanical Phenomena in Dissimilar Welded Joints |
| W. Piekarska, Z. Saternus
Czestochowa University of Technology, 42-201 Czestochowa, Poland |
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| Thermophysical and mechanical phenomena occurring in steel during welding process depend on the type of steel, determined by its chemical composition. During welding of two steels, several issues arise when one steel changes its structure composition during heating and cooling and the other does not change the structure. Changes in microstructure of steel are caused by phase transformations in solid state. In spite of thermal strain, these phase transformations generate additional deformations. The formation of various deformations causes the total deformation of welded joint. Numerical modeling of thermomechanical phenomena in welding processes of dissimilar materials using simulation software is one of the most difficult tasks to carry out. Requires the adaption of appropriate material models in the numerical algorithm for each material and the selection of various thermal properties of the process. The paper presents numerical modeling of thermophysical and mechanical phenomena in a welded joint made of two different materials, 304 stainless steel, in which only thermal deformations arise during welding and S355 structural steel, in which thermal strain and structural strain are present. The simulation software includes temperature dependent material properties. Characteristic zones in welded joint are determined on the basis of numerical simulations as well as displacement and stress field. |
DOI:10.12693/APhysPolA.138.324 topics: welding, numerical modeling, dissimilar materials, thermomechanical phenomena |