Kaynak mikroyapisinin sonlu elelmanlar yöntemi kullanilarak modellenmesi

In the present study, arc welding of the AISI 1045 steel is modelled by using 2D-FEM for three types of welding groove; V, double V and U. The temperature distribution, microstructure, grain growth, and the hardness of the heat affected zone (HAZ) of the welding are simulated. The experimental work is carried out to validate the FE model. The very close value between the simulation and experimental results show that the FE model is very effective for predicting the microstructure, the phase transformation, the grain growth and the hardness. The effect of preheating temperature on the martensite formation is analysed. It is shown that 225oC, 300oC and 350oC pre-heatings eliminate completely the martensite formation for 12 mm thick, V, U and double V-shaped butt welding of AISI 1045 steel. Among the welding grooves, the V-shape is providing the lowest martensite formation and the lowest preheating temperature for martensite elimination.